Trắc nghiệm Reading Unit 1 lớp 12 Tiếng Anh Lớp 12

Câu 1:

Read the following passage and choose the best answer (A, B, C, D):
Although noise, commonly defined as unwanted sound, is a widely recognized form of pollution, it is very difficult to measure because the discomfort experienced by different individuals is highly subjective and, therefore, variable. Exposure to lower levels of noise may be slightly irritating, whereas exposure to higher levels may actually cause hearing loss. Particularly in congested urban areas, the noise produced as a by-product of our advancing technology causes physical and psychological harm, and detracts from the quality of life for those who are exposed to it.Unlike the eyes, which can be covered by the eyelids against strong light, the ear has no lid, and is, therefore, always open and vulnerable; noise penetrates without protection.Noise causes effects that the hearer cannot control and to which the body never becomes accustomed. Loud noises instinctively signal danger to any organism with a hearing mechanism, including human beings. In response, heartbeat and respiration accelerate, blood vessels constrict, the skin pales, and muscles tense. In fact, there is a general increase in functioning brought about by the flow of adrenaline released in response to fear, and some of these responses persist even longer than the noise, occasionally as long as thirty minutes after the sound has ceased.Because noise is unavoidable in a complex, industrial society, we are constantly responding in the same way that we would respond to danger. Recently, researchers have concluded that noise and our response may be much more than an annoyance. It may be a serious threat to physical and psychological health and well-being, causing damage not only to the ear and brain but also to the heart and stomach. We have long known that hearing loss is America’s number one nonfatal health problem, but now we are learning that some of us with heart disease and ulcers may be victims of noise as well. Fetuses exposed to noise tend to be overactive, they cry easily, and they are more sensitive to gastrointestinal problems after birth. In addition, the psychic effect of noise is very important. Nervousness, irritability, tension, and anxiety increase affecting the quality of rest during sleep, and the efficiency of activities during waking hours, as well as the way that we interact with each other.
8. The phrase as well in paragraph 4 is closest in meaning to ___

Câu 2:

Read the following passage and choose the best answer (A, B, C, D):
Although noise, commonly defined as unwanted sound, is a widely recognized form of pollution, it is very difficult to measure because the discomfort experienced by different individuals is highly subjective and, therefore, variable. Exposure to lower levels of noise may be slightly irritating, whereas exposure to higher levels may actually cause hearing loss. Particularly in congested urban areas, the noise produced as a by-product of our advancing technology causes physical and psychological harm, and detracts from the quality of life for those who are exposed to it.Unlike the eyes, which can be covered by the eyelids against strong light, the ear has no lid, and is, therefore, always open and vulnerable; noise penetrates without protection.Noise causes effects that the hearer cannot control and to which the body never becomes accustomed. Loud noises instinctively signal danger to any organism with a hearing mechanism, including human beings. In response, heartbeat and respiration accelerate, blood vessels constrict, the skin pales, and muscles tense. In fact, there is a general increase in functioning brought about by the flow of adrenaline released in response to fear, and some of these responses persist even longer than the noise, occasionally as long as thirty minutes after the sound has ceased.Because noise is unavoidable in a complex, industrial society, we are constantly responding in the same way that we would respond to danger. Recently, researchers have concluded that noise and our response may be much more than an annoyance. It may be a serious threat to physical and psychological health and well-being, causing damage not only to the ear and brain but also to the heart and stomach. We have long known that hearing loss is America’s number one nonfatal health problem, but now we are learning that some of us with heart disease and ulcers may be victims of noise as well. Fetuses exposed to noise tend to be overactive, they cry easily, and they are more sensitive to gastrointestinal problems after birth. In addition, the psychic effect of noise is very important. Nervousness, irritability, tension, and anxiety increase affecting the quality of rest during sleep, and the efficiency of activities during waking hours, as well as the way that we interact with each other.
7. Look at the verb accelerate in paragraph 3. Which of the following is the closest in meaning to _____

Câu 3:

Read the following passage and choose the best answer (A, B, C, D):
Although noise, commonly defined as unwanted sound, is a widely recognized form of pollution, it is very difficult to measure because the discomfort experienced by different individuals is highly subjective and, therefore, variable. Exposure to lower levels of noise may be slightly irritating, whereas exposure to higher levels may actually cause hearing loss. Particularly in congested urban areas, the noise produced as a by-product of our advancing technology causes physical and psychological harm, and detracts from the quality of life for those who are exposed to it.Unlike the eyes, which can be covered by the eyelids against strong light, the ear has no lid, and is, therefore, always open and vulnerable; noise penetrates without protection.Noise causes effects that the hearer cannot control and to which the body never becomes accustomed. Loud noises instinctively signal danger to any organism with a hearing mechanism, including human beings. In response, heartbeat and respiration accelerate, blood vessels constrict, the skin pales, and muscles tense. In fact, there is a general increase in functioning brought about by the flow of adrenaline released in response to fear, and some of these responses persist even longer than the noise, occasionally as long as thirty minutes after the sound has ceased.Because noise is unavoidable in a complex, industrial society, we are constantly responding in the same way that we would respond to danger. Recently, researchers have concluded that noise and our response may be much more than an annoyance. It may be a serious threat to physical and psychological health and well-being, causing damage not only to the ear and brain but also to the heart and stomach. We have long known that hearing loss is America’s number one nonfatal health problem, but now we are learning that some of us with heart disease and ulcers may be victims of noise as well. Fetuses exposed to noise tend to be overactive, they cry easily, and they are more sensitive to gastrointestinal problems after birth. In addition, the psychic effect of noise is very important. Nervousness, irritability, tension, and anxiety increase affecting the quality of rest during sleep, and the efficiency of activities during waking hours, as well as the way that we interact with each other.
6. According to the passage, people respond to loud noises in the same way that they respond to ___

Câu 4:

Read the following passage and choose the best answer (A, B, C, D):
Although noise, commonly defined as unwanted sound, is a widely recognized form of pollution, it is very difficult to measure because the discomfort experienced by different individuals is highly subjective and, therefore, variable. Exposure to lower levels of noise may be slightly irritating, whereas exposure to higher levels may actually cause hearing loss. Particularly in congested urban areas, the noise produced as a by-product of our advancing technology causes physical and psychological harm, and detracts from the quality of life for those who are exposed to it.Unlike the eyes, which can be covered by the eyelids against strong light, the ear has no lid, and is, therefore, always open and vulnerable; noise penetrates without protection.Noise causes effects that the hearer cannot control and to which the body never becomes accustomed. Loud noises instinctively signal danger to any organism with a hearing mechanism, including human beings. In response, heartbeat and respiration accelerate, blood vessels constrict, the skin pales, and muscles tense. In fact, there is a general increase in functioning brought about by the flow of adrenaline released in response to fear, and some of these responses persist even longer than the noise, occasionally as long as thirty minutes after the sound has ceased.Because noise is unavoidable in a complex, industrial society, we are constantly responding in the same way that we would respond to danger. Recently, researchers have concluded that noise and our response may be much more than an annoyance. It may be a serious threat to physical and psychological health and well-being, causing damage not only to the ear and brain but also to the heart and stomach. We have long known that hearing loss is America’s number one nonfatal health problem, but now we are learning that some of us with heart disease and ulcers may be victims of noise as well. Fetuses exposed to noise tend to be overactive, they cry easily, and they are more sensitive to gastrointestinal problems after birth. In addition, the psychic effect of noise is very important. Nervousness, irritability, tension, and anxiety increase affecting the quality of rest during sleep, and the efficiency of activities during waking hours, as well as the way that we interact with each other.
5. The word it in the first paragraph refers to ___

Câu 5:

Read the following passage and choose the best answer (A, B, C, D):
Although noise, commonly defined as unwanted sound, is a widely recognized form of pollution, it is very difficult to measure because the discomfort experienced by different individuals is highly subjective and, therefore, variable. Exposure to lower levels of noise may be slightly irritating, whereas exposure to higher levels may actually cause hearing loss. Particularly in congested urban areas, the noise produced as a by-product of our advancing technology causes physical and psychological harm, and detracts from the quality of life for those who are exposed to it.Unlike the eyes, which can be covered by the eyelids against strong light, the ear has no lid, and is, therefore, always open and vulnerable; noise penetrates without protection.Noise causes effects that the hearer cannot control and to which the body never becomes accustomed. Loud noises instinctively signal danger to any organism with a hearing mechanism, including human beings. In response, heartbeat and respiration accelerate, blood vessels constrict, the skin pales, and muscles tense. In fact, there is a general increase in functioning brought about by the flow of adrenaline released in response to fear, and some of these responses persist even longer than the noise, occasionally as long as thirty minutes after the sound has ceased.Because noise is unavoidable in a complex, industrial society, we are constantly responding in the same way that we would respond to danger. Recently, researchers have concluded that noise and our response may be much more than an annoyance. It may be a serious threat to physical and psychological health and well-being, causing damage not only to the ear and brain but also to the heart and stomach. We have long known that hearing loss is America’s number one nonfatal health problem, but now we are learning that some of us with heart disease and ulcers may be victims of noise as well. Fetuses exposed to noise tend to be overactive, they cry easily, and they are more sensitive to gastrointestinal problems after birth. In addition, the psychic effect of noise is very important. Nervousness, irritability, tension, and anxiety increase affecting the quality of rest during sleep, and the efficiency of activities during waking hours, as well as the way that we interact with each other.
4. The word congested in paragraph 1 could best be replaced by ___.

Câu 6:

Read the following passage and choose the best answer (A, B, C, D):
Although noise, commonly defined as unwanted sound, is a widely recognized form of pollution, it is very difficult to measure because the discomfort experienced by different individuals is highly subjective and, therefore, variable. Exposure to lower levels of noise may be slightly irritating, whereas exposure to higher levels may actually cause hearing loss. Particularly in congested urban areas, the noise produced as a by-product of our advancing technology causes physical and psychological harm, and detracts from the quality of life for those who are exposed to it.Unlike the eyes, which can be covered by the eyelids against strong light, the ear has no lid, and is, therefore, always open and vulnerable; noise penetrates without protection.Noise causes effects that the hearer cannot control and to which the body never becomes accustomed. Loud noises instinctively signal danger to any organism with a hearing mechanism, including human beings. In response, heartbeat and respiration accelerate, blood vessels constrict, the skin pales, and muscles tense. In fact, there is a general increase in functioning brought about by the flow of adrenaline released in response to fear, and some of these responses persist even longer than the noise, occasionally as long as thirty minutes after the sound has ceased.Because noise is unavoidable in a complex, industrial society, we are constantly responding in the same way that we would respond to danger. Recently, researchers have concluded that noise and our response may be much more than an annoyance. It may be a serious threat to physical and psychological health and well-being, causing damage not only to the ear and brain but also to the heart and stomach. We have long known that hearing loss is America’s number one nonfatal health problem, but now we are learning that some of us with heart disease and ulcers may be victims of noise as well. Fetuses exposed to noise tend to be overactive, they cry easily, and they are more sensitive to gastrointestinal problems after birth. In addition, the psychic effect of noise is very important. Nervousness, irritability, tension, and anxiety increase affecting the quality of rest during sleep, and the efficiency of activities during waking hours, as well as the way that we interact with each other.
3. Why is noise difficult to measure?

Câu 7:

Read the following passage and choose the best answer (A, B, C, D):
Although noise, commonly defined as unwanted sound, is a widely recognized form of pollution, it is very difficult to measure because the discomfort experienced by different individuals is highly subjective and, therefore, variable. Exposure to lower levels of noise may be slightly irritating, whereas exposure to higher levels may actually cause hearing loss. Particularly in congested urban areas, the noise produced as a by-product of our advancing technology causes physical and psychological harm, and detracts from the quality of life for those who are exposed to it.Unlike the eyes, which can be covered by the eyelids against strong light, the ear has no lid, and is, therefore, always open and vulnerable; noise penetrates without protection.Noise causes effects that the hearer cannot control and to which the body never becomes accustomed. Loud noises instinctively signal danger to any organism with a hearing mechanism, including human beings. In response, heartbeat and respiration accelerate, blood vessels constrict, the skin pales, and muscles tense. In fact, there is a general increase in functioning brought about by the flow of adrenaline released in response to fear, and some of these responses persist even longer than the noise, occasionally as long as thirty minutes after the sound has ceased.Because noise is unavoidable in a complex, industrial society, we are constantly responding in the same way that we would respond to danger. Recently, researchers have concluded that noise and our response may be much more than an annoyance. It may be a serious threat to physical and psychological health and well-being, causing damage not only to the ear and brain but also to the heart and stomach. We have long known that hearing loss is America’s number one nonfatal health problem, but now we are learning that some of us with heart disease and ulcers may be victims of noise as well. Fetuses exposed to noise tend to be overactive, they cry easily, and they are more sensitive to gastrointestinal problems after birth. In addition, the psychic effect of noise is very important. Nervousness, irritability, tension, and anxiety increase affecting the quality of rest during sleep, and the efficiency of activities during waking hours, as well as the way that we interact with each other.
2. According to the passage, what is noise?

Câu 8:

Read the following passage and choose the best answer (A, B, C, D):
Although noise, commonly defined as unwanted sound, is a widely recognized form of pollution, it is very difficult to measure because the discomfort experienced by different individuals is highly subjective and, therefore, variable. Exposure to lower levels of noise may be slightly irritating, whereas exposure to higher levels may actually cause hearing loss. Particularly in congested urban areas, the noise produced as a by-product of our advancing technology causes physical and psychological harm, and detracts from the quality of life for those who are exposed to it.Unlike the eyes, which can be covered by the eyelids against strong light, the ear has no lid, and is, therefore, always open and vulnerable; noise penetrates without protection.Noise causes effects that the hearer cannot control and to which the body never becomes accustomed. Loud noises instinctively signal danger to any organism with a hearing mechanism, including human beings. In response, heartbeat and respiration accelerate, blood vessels constrict, the skin pales, and muscles tense. In fact, there is a general increase in functioning brought about by the flow of adrenaline released in response to fear, and some of these responses persist even longer than the noise, occasionally as long as thirty minutes after the sound has ceased.Because noise is unavoidable in a complex, industrial society, we are constantly responding in the same way that we would respond to danger. Recently, researchers have concluded that noise and our response may be much more than an annoyance. It may be a serious threat to physical and psychological health and well-being, causing damage not only to the ear and brain but also to the heart and stomach. We have long known that hearing loss is America’s number one nonfatal health problem, but now we are learning that some of us with heart disease and ulcers may be victims of noise as well. Fetuses exposed to noise tend to be overactive, they cry easily, and they are more sensitive to gastrointestinal problems after birth. In addition, the psychic effect of noise is very important. Nervousness, irritability, tension, and anxiety increase affecting the quality of rest during sleep, and the efficiency of activities during waking hours, as well as the way that we interact with each other.

1. Which of the following is the author‟s main point?

Câu 9:

Read the following passage and choose the best answer (A, B, C, D):
Throughout the world there are different ways for people to greet each other. In much of the world, a handshake is the (1) _________ form of welcoming and greeting someone. In many countries around the Mediterranean Sea a (2) _________ kiss on the cheek is the appropriate way to welcome friends and family. It can be a very (3) _________ surprise if you expect to shake hands and get a kiss or a hug instead. At times, it is difficult to tell what sort of greeting (4) _________is followed. People may bow, grab another’s arm or even slap the other person on the back. In some places people just smile, look at the other’s face and say nothing. Most people in the world are tolerant of visitors and don’t mind what travellers do that seems wrong as long as the visitors are (5) _________. A big part of the delightfulness of world travel is experiencing different customs.

Câu 10:

Read the following passage and choose the best answer (A, B, C, D):
Throughout the world there are different ways for people to greet each other. In much of the world, a handshake is the (1) _________ form of welcoming and greeting someone. In many countries around the Mediterranean Sea a (2) _________ kiss on the cheek is the appropriate way to welcome friends and family. It can be a very (3) _________ surprise if you expect to shake hands and get a kiss or a hug instead. At times, it is difficult to tell what sort of greeting (4) _________is followed. People may bow, grab another’s arm or even slap the other person on the back. In some places people just smile, look at the other’s face and say nothing. Most people in the world are tolerant of visitors and don’t mind what travellers do that seems wrong as long as the visitors are (5) _________. A big part of the delightfulness of world travel is experiencing different customs

Câu 11:

Read the following passage and choose the best answer (A, B, C, D):
Throughout the world there are different ways for people to greet each other. In much of the world, a handshake is the (1) _________ form of welcoming and greeting someone. In many countries around the Mediterranean Sea a (2) _________ kiss on the cheek is the appropriate way to welcome friends and family. It can be a very (3) _________ surprise if you expect to shake hands and get a kiss or a hug instead. At times, it is difficult to tell what sort of greeting (4) _________is followed. People may bow, grab another’s arm or even slap the other person on the back. In some places people just smile, look at the other’s face and say nothing. Most people in the world are tolerant of visitors and don’t mind what travellers do that seems wrong as long as the visitors are (5) _________. A big part of the delightfulness of world travel is experiencing different customs

Câu 12:

Read the following passage and choose the best answer (A, B, C, D):Throughout the world there are different ways for people to greet each other. In much of the world, a handshake is the (1) _________ form of welcoming and greeting someone. In many countries around the Mediterranean Sea a (2) _________ kiss on the cheek is the appropriate way to welcome friends and family. It can be a very (3) _________ surprise if you expect to shake hands and get a kiss or a hug instead. At times, it is difficult to tell what sort of greeting (4) _________is followed. People may bow, grab another’s arm or even slap the other person on the back. In some places people just smile, look at the other’s face and say nothing. Most people in the world are tolerant of visitors and don’t mind what travellers do that seems wrong as long as the visitors are (5) _________. A big part of the delightfulness of world travel is experiencing different customs.

Câu 13:

Read the following passage and choose the best answer (A, B, C, D):
Throughout the world there are different ways for people to greet each other. In much of the world, a handshake is the (1) _________ form of welcoming and greeting someone. In many countries around the Mediterranean Sea a (2) _________ kiss on the cheek is the appropriate way to welcome friends and family. It can be a very (3) _________ surprise if you expect to shake hands and get a kiss or a hug instead. At times, it is difficult to tell what sort of greeting (4) _________is followed. People may bow, grab another’s arm or even slap the other person on the back. In some places people just smile, look at the other’s face and say nothing. Most people in the world are tolerant of visitors and don’t mind what travellers do that seems wrong as long as the visitors are (5) _________. A big part of the delightfulness of world travel is experiencing different customs

Câu 14:

Read the following passage and choose the best answer (A, B, C, D):
Left-handers are the odd ones out. Sure, lefties (1) ______up about 10 percent of the population - but, frankly, it seems like society has forgotten about them. Just consider all of the right- handed gadgets, awkwardly designed desks, and cooking tools that fit comfortably only in your right hand. What (2) ______someone to become a lefthand? Scientists aren’t exactly sure, but research points to a complex (3) ______between genes and environment While no exact set of “leftie genes” have been discovered, people who dominantly use their left hands do have more left-handed family members. And researchers have found different brain wirings in righties vs. lefties. But no matter (4) ______it is that drives someone to use their antipodal paw, science has also uncovered a particular set of personality traits that left-handed people tend to have. So for all of you lefties, leftie-loving righties, and ambidextrous folks out there - it’s time to brush up on your left-handed knowledge and help (5) ______an end to leftie discrimination once and for all

Câu 15:

Read the following passage and choose the best answer (A, B, C, D):
Left-handers are the odd ones out. Sure, lefties (1) ______up about 10 percent of the population - but, frankly, it seems like society has forgotten about them. Just consider all of the right- handed gadgets, awkwardly designed desks, and cooking tools that fit comfortably only in your right hand. What (2) ______someone to become a lefthand? Scientists aren’t exactly sure, but research points to a complex (3) ______between genes and environment While no exact set of “leftie genes” have been discovered, people who dominantly use their left hands do have more left-handed family members. And researchers have found different brain wirings in righties vs. lefties. But no matter (4) ______it is that drives someone to use their antipodal paw, science has also uncovered a particular set of personality traits that left-handed people tend to have. So for all of you lefties, leftie-loving righties, and ambidextrous folks out there - it’s time to brush up on your left-handed knowledge and help (5) ______an end to leftie discrimination once and for all.

Câu 16:

Read the following passage and choose the best answer (A, B, C, D):
Left-handers are the odd ones out. Sure, lefties (1) ______up about 10 percent of the population - but, frankly, it seems like society has forgotten about them. Just consider all of the right- handed gadgets, awkwardly designed desks, and cooking tools that fit comfortably only in your right hand. What (2) ______someone to become a lefthand? Scientists aren’t exactly sure, but research points to a complex (3) ______between genes and environment While no exact set of “leftie genes” have been discovered, people who dominantly use their left hands do have more left-handed family members. And researchers have found different brain wirings in righties vs. lefties. But no matter (4) ______it is that drives someone to use their antipodal paw, science has also uncovered a particular set of personality traits that left-handed people tend to have. So for all of you lefties, leftie-loving righties, and ambidextrous folks out there - it’s time to brush up on your left-handed knowledge and help (5) ______an end to leftie discrimination once and for all

Câu 17:

Read the following passage and choose the best answer (A, B, C, D):
Left-handers are the odd ones out. Sure, lefties (1) ______up about 10 percent of the population - but, frankly, it seems like society has forgotten about them. Just consider all of the right- handed gadgets, awkwardly designed desks, and cooking tools that fit comfortably only in your right hand. What (2) ______someone to become a lefthand? Scientists aren’t exactly sure, but research points to a complex (3) ______between genes and environment While no exact set of “leftie genes” have been discovered, people who dominantly use their left hands do have more left-handed family members. And researchers have found different brain wirings in righties vs. lefties. But no matter (4) ______it is that drives someone to use their antipodal paw, science has also uncovered a particular set of personality traits that left-handed people tend to have. So for all of you lefties, leftie-loving righties, and ambidextrous folks out there - it’s time to brush up on your left-handed knowledge and help (5) ______an end to leftie discrimination once and for all

Câu 18:

Read the following passage and choose the best answer (A, B, C, D):
Left-handers are the odd ones out. Sure, lefties (1) ______up about 10 percent of the population - but, frankly, it seems like society has forgotten about them. Just consider all of the right- handed gadgets, awkwardly designed desks, and cooking tools that fit comfortably only in your right hand. What (2) ______someone to become a lefthand? Scientists aren’t exactly sure, but research points to a complex (3) ______between genes and environment While no exact set of “leftie genes” have been discovered, people who dominantly use their left hands do have more left-handed family members. And researchers have found different brain wirings in righties vs. lefties. But no matter (4) ______it is that drives someone to use their antipodal paw, science has also uncovered a particular set of personality traits that left-handed people tend to have. So for all of you lefties, leftie-loving righties, and ambidextrous folks out there - it’s time to brush up on your left-handed knowledge and help (5) ______an end to leftie discrimination once and for all

Câu 19:

Read the following passage and choose the best answer (A, B, C, D):
Last year, there were millions of international tourist arrivals across the globe. Whether they were students on their (1)______ years looking for overseas adventure, stressed-out workers hoping to get away for a weekend, or retirees (2)______ to relax in an exotic location- clearly none of them thought they could find the same experience at home. The question is whether foreign travel brings more advantages or disadvantages. An obvious positive point is that going abroad sometimes helps people to expand their knowledge of the world. If they are (3)_____ – minded, they can learn about new cultures and hopefully gain a more accurate understanding about their way of life. In addition, there is the economic benefit of tourism to countries which have few other resources. It can provide an income to many people within the industry. Having said that, some people simply go to a foreign resort (4)______ by high walls and therefore learn little about their holiday (5)______. Another issue is that hordes of tourists often spoil the “unspoilt” places they visit. The most recent example of this is Antarctica, where last year cruise ships took thousands of visitors to view the disappearing icebergs and wildlife. Vegetation, nesting penguins and resting walrus are vulnerable when humans intrude

Câu 20:

Read the following passage and choose the best answer (A, B, C, D):
Last year, there were millions of international tourist arrivals across the globe. Whether they were students on their (1)______ years looking for overseas adventure, stressed-out workers hoping to get away for a weekend, or retirees (2)______ to relax in an exotic location- clearly none of them thought they could find the same experience at home. The question is whether foreign travel brings more advantages or disadvantages. An obvious positive point is that going abroad sometimes helps people to expand their knowledge of the world. If they are (3)_____ – minded, they can learn about new cultures and hopefully gain a more accurate understanding about their way of life. In addition, there is the economic benefit of tourism to countries which have few other resources. It can provide an income to many people within the industry. Having said that, some people simply go to a foreign resort (4)______ by high walls and therefore learn little about their holiday (5)______. Another issue is that hordes of tourists often spoil the “unspoilt” places they visit. The most recent example of this is Antarctica, where last year cruise ships took thousands of visitors to view the disappearing icebergs and wildlife. Vegetation, nesting penguins and resting walrus are vulnerable when humans intrude

Câu 21:

Read the following passage and choose the best answer (A, B, C, D):
Last year, there were millions of international tourist arrivals across the globe. Whether they were students on their (1)______ years looking for overseas adventure, stressed-out workers hoping to get away for a weekend, or retirees (2)______ to relax in an exotic location- clearly none of them thought they could find the same experience at home. The question is whether foreign travel brings more advantages or disadvantages. An obvious positive point is that going abroad sometimes helps people to expand their knowledge of the world. If they are (3)_____ – minded, they can learn about new cultures and hopefully gain a more accurate understanding about their way of life. In addition, there is the economic benefit of tourism to countries which have few other resources. It can provide an income to many people within the industry. Having said that, some people simply go to a foreign resort (4)______ by high walls and therefore learn little about their holiday (5)______. Another issue is that hordes of tourists often spoil the “unspoilt” places they visit. The most recent example of this is Antarctica, where last year cruise ships took thousands of visitors to view the disappearing icebergs and wildlife. Vegetation, nesting penguins and resting walrus are vulnerable when humans intrude

Câu 22:

Read the following passage and choose the best answer (A, B, C, D):
Last year, there were millions of international tourist arrivals across the globe. Whether they were students on their (1)______ years looking for overseas adventure, stressed-out workers hoping to get away for a weekend, or retirees (2)______ to relax in an exotic location- clearly none of them thought they could find the same experience at home. The question is whether foreign travel brings more advantages or disadvantages. An obvious positive point is that going abroad sometimes helps people to expand their knowledge of the world. If they are (3)_____ – minded, they can learn about new cultures and hopefully gain a more accurate understanding about their way of life. In addition, there is the economic benefit of tourism to countries which have few other resources. It can provide an income to many people within the industry. Having said that, some people simply go to a foreign resort (4)______ by high walls and therefore learn little about their holiday (5)______. Another issue is that hordes of tourists often spoil the “unspoilt” places they visit. The most recent example of this is Antarctica, where last year cruise ships took thousands of visitors to view the disappearing icebergs and wildlife. Vegetation, nesting penguins and resting walrus are vulnerable when humans intrude

Câu 23:

Read the following passage and choose the best answer (A, B, C, D):
Last year, there were millions of international tourist arrivals across the globe. Whether they were students on their (1)______ years looking for overseas adventure, stressed-out workers hoping to get away for a weekend, or retirees (2)______ to relax in an exotic location- clearly none of them thought they could find the same experience at home. The question is whether foreign travel brings more advantages or disadvantages. An obvious positive point is that going abroad sometimes helps people to expand their knowledge of the world. If they are (3)_____ – minded, they can learn about new cultures and hopefully gain a more accurate understanding about their way of life. In addition, there is the economic benefit of tourism to countries which have few other resources. It can provide an income to many people within the industry. Having said that, some people simply go to a foreign resort (4)______ by high walls and therefore learn little about their holiday (5)______. Another issue is that hordes of tourists often spoil the “unspoilt” places they visit. The most recent example of this is Antarctica, where last year cruise ships took thousands of visitors to view the disappearing icebergs and wildlife. Vegetation, nesting penguins and resting walrus are vulnerable when humans intrude

Câu 24:

Read the following passage and choose the best answer (A, B, C, D):
An important point to remember if you like spending time out in the open air is that the human head doesn’t work very well outdoors if it becomes too hot, cold or wet. That’s why a hat is a good investment, whenever you are planning to go out and about. Surprisingly, a single waterproof hat with a brim will do the (1)______ adequately in most conditions. In cold climates, the problem is that the head is (2)______ heat all the time. As much as fifty to sixty per cent of your body’s heat is lost through the head and neck, (3)______ on which scientist you believe. Clearly this heat loss needs to be prevented, but it’s important to remember that hats don’t actually keep you warm, they simply stop heat escaping. Just as important is the need to protect your neck from the effects of bright sunlight, and the brim of your hat will do this. If you prefer a baseball cap, (4)______ buying one that has a drop down ‘tail’ at the back to stop your neck getting sunburnt. And in wet weather (5)______, hats are often more practical than pooling up the hood of your waterproof coat because when you turn your head, the hat goes with you, whereas the hood usually does not

Câu 25:

Read the following passage and choose the best answer (A, B, C, D):
An important point to remember if you like spending time out in the open air is that the human head doesn’t work very well outdoors if it becomes too hot, cold or wet. That’s why a hat is a good investment, whenever you are planning to go out and about. Surprisingly, a single waterproof hat with a brim will do the (1)______ adequately in most conditions. In cold climates, the problem is that the head is (2)______ heat all the time. As much as fifty to sixty per cent of your body’s heat is lost through the head and neck, (3)______ on which scientist you believe. Clearly this heat loss needs to be prevented, but it’s important to remember that hats don’t actually keep you warm, they simply stop heat escaping. Just as important is the need to protect your neck from the effects of bright sunlight, and the brim of your hat will do this. If you prefer a baseball cap, (4)______ buying one that has a drop down ‘tail’ at the back to stop your neck getting sunburnt. And in wet weather (5)______, hats are often more practical than pooling up the hood of your waterproof coat because when you turn your head, the hat goes with you, whereas the hood usually does not

Câu 26:

Read the following passage and choose the best answer (A, B, C, D):
An important point to remember if you like spending time out in the open air is that the human head doesn’t work very well outdoors if it becomes too hot, cold or wet. That’s why a hat is a good investment, whenever you are planning to go out and about. Surprisingly, a single waterproof hat with a brim will do the (1)______ adequately in most conditions. In cold climates, the problem is that the head is (2)______ heat all the time. As much as fifty to sixty per cent of your body’s heat is lost through the head and neck, (3)______ on which scientist you believe. Clearly this heat loss needs to be prevented, but it’s important to remember that hats don’t actually keep you warm, they simply stop heat escaping. Just as important is the need to protect your neck from the effects of bright sunlight, and the brim of your hat will do this. If you prefer a baseball cap, (4)______ buying one that has a drop down ‘tail’ at the back to stop your neck getting sunburnt. And in wet weather (5)______, hats are often more practical than pooling up the hood of your waterproof coat because when you turn your head, the hat goes with you, whereas the hood usually does not

Câu 27:

Read the following passage and choose the best answer (A, B, C, D):
An important point to remember if you like spending time out in the open air is that the human head doesn’t work very well outdoors if it becomes too hot, cold or wet. That’s why a hat is a good investment, whenever you are planning to go out and about. Surprisingly, a single waterproof hat with a brim will do the (1)______ adequately in most conditions. In cold climates, the problem is that the head is (2)______ heat all the time. As much as fifty to sixty per cent of your body’s heat is lost through the head and neck, (3)______ on which scientist you believe. Clearly this heat loss needs to be prevented, but it’s important to remember that hats don’t actually keep you warm, they simply stop heat escaping. Just as important is the need to protect your neck from the effects of bright sunlight, and the brim of your hat will do this. If you prefer a baseball cap, (4)______ buying one that has a drop down ‘tail’ at the back to stop your neck getting sunburnt. And in wet weather (5)______, hats are often more practical than pooling up the hood of your waterproof coat because when you turn your head, the hat goes with you, whereas the hood usually does not

Câu 28:

Read the following passage and choose the best answer (A, B, C, D):
An important point to remember if you like spending time out in the open air is that the human head doesn’t work very well outdoors if it becomes too hot, cold or wet. That’s why a hat is a good investment, whenever you are planning to go out and about. Surprisingly, a single waterproof hat with a brim will do the (1)______ adequately in most conditions. In cold climates, the problem is that the head is (2)______ heat all the time. As much as fifty to sixty per cent of your body’s heat is lost through the head and neck, (3)______ on which scientist you believe. Clearly this heat loss needs to be prevented, but it’s important to remember that hats don’t actually keep you warm, they simply stop heat escaping. Just as important is the need to protect your neck from the effects of bright sunlight, and the brim of your hat will do this. If you prefer a baseball cap, (4)______ buying one that has a drop down ‘tail’ at the back to stop your neck getting sunburnt. And in wet weather (5)______, hats are often more practical than pooling up the hood of your waterproof coat because when you turn your head, the hat goes with you, whereas the hood usually does not

Câu 29:

Read the following passage and choose the best answer (A, B, C, D):
Why is it that many teenagers have the energy to play computer games until late at night but can’t find the energy to get out of bed (1) ________ for school? According to a new report, today’s generation of children are in danger of getting so (2)_______ sleep that they are putting their mental and physical health at (3)_______. Adults can easily survive on seven to eight hours’ sleep a night (4)_____teenagers require nine or ten hours. According to medical experts, one in five youngsters (5)________ anything between two and five hours’ sleep a night less than their parents did at their age.

Câu 30:

Read the following passage and choose the best answer (A, B, C, D):
Why is it that many teenagers have the energy to play computer games until late at night but can’t find the energy to get out of bed (1) ________ for school? According to a new report, today’s generation of children are in danger of getting so (2)_______ sleep that they are putting their mental and physical health at (3)_______. Adults can easily survive on seven to eight hours’ sleep a night (4)_____teenagers require nine or ten hours. According to medical experts, one in five youngsters (5)________ anything between two and five hours’ sleep a night less than their parents did at their age

Câu 31:

Read the following passage and choose the best answer (A, B, C, D):
Why is it that many teenagers have the energy to play computer games until late at night but can’t find the energy to get out of bed (1) ________ for school? According to a new report, today’s generation of children are in danger of getting so (2)_______ sleep that they are putting their mental and physical health at (3)_______. Adults can easily survive on seven to eight hours’ sleep a night (4)_____teenagers require nine or ten hours. According to medical experts, one in five youngsters (5)________ anything between two and five hours’ sleep a night less than their parents did at their age.

Câu 32:

Read the following passage and choose the best answer (A, B, C, D):
Why is it that many teenagers have the energy to play computer games until late at night but can’t find the energy to get out of bed (1) ________ for school? According to a new report, today’s generation of children are in danger of getting so (2)_______ sleep that they are putting their mental and physical health at (3)_______. Adults can easily survive on seven to eight hours’ sleep a night (4)_____teenagers require nine or ten hours. According to medical experts, one in five youngsters (5)________ anything between two and five hours’ sleep a night less than their parents did at their age.

Câu 33:

Read the following passage and choose the best answer (A, B, C, D):
Why is it that many teenagers have the energy to play computer games until late at night but can’t find the energy to get out of bed (1) ________ for school? According to a new report, today’s generation of children are in danger of getting so (2)_______ sleep that they are putting their mental and physical health at (3)_______. Adults can easily survive on seven to eight hours’ sleep a night (4)_____teenagers require nine or ten hours. According to medical experts, one in five youngsters (5)________ anything between two and five hours’ sleep a night less than their parents did at their age

Câu 34:

Read the following passage and choose the best answer (A, B, C, D):
British families started going on holiday to the seaside around the middle of the 19th century. The invention of the railways made this possible. The first holidaymakers were quite rich and went for their health and education. The seaside was a place to be (1)__________of illnesses, and doctors recommended bathing in the sea and drinking sea water. Also to increase their knowledge, families attended concerts and read books from libraries. At that time, ordinary working people had very little time (2)__________. However, in 1871, the government introduce four “Bank Holidays” – national holiday days. This allowed people to have a day or two out, which now and then gave them a taste for leisure and the seaside. At first they went on day-trips, taking (3)__________of special cheap tickets on the railways. By the 1880s, rising incomes meant many ordinary workers and their families could have a week’s holiday at the seaside. Rail fares were reduced and cheap hotels were built to (4)_________ them. Holidaymakers enjoyed being idle, sitting on the beach, bathing in the sea, and eating ice-cream. Cheap entertainment was (5)__________offer and holidaymakers went to have fun. Today, the English seaside remained popular, with more than 18 million holidays taken there each year.

Câu 35:

Read the following passage and choose the best answer (A, B, C, D):
British families started going on holiday to the seaside around the middle of the 19th century. The invention of the railways made this possible. The first holidaymakers were quite rich and went for their health and education. The seaside was a place to be (1)__________of illnesses, and doctors recommended bathing in the sea and drinking sea water. Also to increase their knowledge, families attended concerts and read books from libraries. At that time, ordinary working people had very little time (2)__________. However, in 1871, the government introduce four “Bank Holidays” – national holiday days. This allowed people to have a day or two out, which now and then gave them a taste for leisure and the seaside. At first they went on day-trips, taking (3)__________of special cheap tickets on the railways. By the 1880s, rising incomes meant many ordinary workers and their families could have a week’s holiday at the seaside. Rail fares were reduced and cheap hotels were built to (4)_________ them. Holidaymakers enjoyed being idle, sitting on the beach, bathing in the sea, and eating ice-cream. Cheap entertainment was (5)__________offer and holidaymakers went to have fun. Today, the English seaside remained popular, with more than 18 million holidays taken there each year.

Câu 36:

Read the following passage and choose the best answer (A, B, C, D):
British families started going on holiday to the seaside around the middle of the 19th century. The invention of the railways made this possible. The first holidaymakers were quite rich and went for their health and education. The seaside was a place to be (1)__________of illnesses, and doctors recommended bathing in the sea and drinking sea water. Also to increase their knowledge, families attended concerts and read books from libraries. At that time, ordinary working people had very little time (2)__________. However, in 1871, the government introduce four “Bank Holidays” – national holiday days. This allowed people to have a day or two out, which now and then gave them a taste for leisure and the seaside. At first they went on day-trips, taking (3)__________of special cheap tickets on the railways. By the 1880s, rising incomes meant many ordinary workers and their families could have a week’s holiday at the seaside. Rail fares were reduced and cheap hotels were built to (4)_________ them. Holidaymakers enjoyed being idle, sitting on the beach, bathing in the sea, and eating ice-cream. Cheap entertainment was (5)__________offer and holidaymakers went to have fun. Today, the English seaside remained popular, with more than 18 million holidays taken there each year

Câu 37:

Read the following passage and choose the best answer (A, B, C, D):
British families started going on holiday to the seaside around the middle of the 19th century. The invention of the railways made this possible. The first holidaymakers were quite rich and went for their health and education. The seaside was a place to be (1)__________of illnesses, and doctors recommended bathing in the sea and drinking sea water. Also to increase their knowledge, families attended concerts and read books from libraries. At that time, ordinary working people had very little time (2)__________. However, in 1871, the government introduce four “Bank Holidays” – national holiday days. This allowed people to have a day or two out, which now and then gave them a taste for leisure and the seaside. At first they went on day-trips, taking (3)__________of special cheap tickets on the railways. By the 1880s, rising incomes meant many ordinary workers and their families could have a week’s holiday at the seaside. Rail fares were reduced and cheap hotels were built to (4)_________ them. Holidaymakers enjoyed being idle, sitting on the beach, bathing in the sea, and eating ice-cream. Cheap entertainment was (5)__________offer and holidaymakers went to have fun. Today, the English seaside remained popular, with more than 18 million holidays taken there each year

Câu 38:

Read the following passage and choose the best answer (A, B, C, D):
British families started going on holiday to the seaside around the middle of the 19th century. The invention of the railways made this possible. The first holidaymakers were quite rich and went for their health and education. The seaside was a place to be (1)__________of illnesses, and doctors recommended bathing in the sea and drinking sea water. Also to increase their knowledge, families attended concerts and read books from libraries. At that time, ordinary working people had very little time (2)__________. However, in 1871, the government introduce four “Bank Holidays” – national holiday days. This allowed people to have a day or two out, which now and then gave them a taste for leisure and the seaside. At first they went on day-trips, taking (3)__________of special cheap tickets on the railways. By the 1880s, rising incomes meant many ordinary workers and their families could have a week’s holiday at the seaside. Rail fares were reduced and cheap hotels were built to (4)_________ them. Holidaymakers enjoyed being idle, sitting on the beach, bathing in the sea, and eating ice-cream. Cheap entertainment was (5)__________offer and holidaymakers went to have fun. Today, the English seaside remained popular, with more than 18 million holidays taken there each year

Câu 39:

Read the following passage and choose the best answer (A, B, C, D):
Left-handers are the odd ones out. Sure, lefties (1) ______up about 10 percent of the population but, frankly, it seems like society has forgotten about them. Just consider all of the right-handed gadgets, awkwardly designed desks, and cooking tools that fit comfortably only in your right hand. What (2)______someone to become a lefthand? Scientists aren’t exactly sure, but research points to a complex (3)______between genes and environment.  While no exact set of “leftie genes” have been discovered, people who dominantly use their left hands do have more left-handed family members. And researchers have found different brain wirings in righties vs. lefties. But no matter (4) ______it is that drives someone to use their antipodal paw, science has also uncovered a particular set of personality traits that left-handed people tend to have. So for all of you lefties, leftie-loving righties, and ambidextrous folks out there - it’s time to brush up on your left-handed knowledge and help (5) ______an end to leftie discrimination once and for all

Câu 40:

Read the following passage and choose the best answer (A, B, C, D):
Left-handers are the odd ones out. Sure, lefties (1) ______up about 10 percent of the population but, frankly, it seems like society has forgotten about them. Just consider all of the right-handed gadgets, awkwardly designed desks, and cooking tools that fit comfortably only in your right hand. What (2)______someone to become a lefthand? Scientists aren’t exactly sure, but research points to a complex (3)______between genes and environment.  While no exact set of “leftie genes” have been discovered, people who dominantly use their left hands do have more left-handed family members. And researchers have found different brain wirings in righties vs. lefties. But no matter (4) ______it is that drives someone to use their antipodal paw, science has also uncovered a particular set of personality traits that left-handed people tend to have. So for all of you lefties, leftie-loving righties, and ambidextrous folks out there - it’s time to brush up on your left-handed knowledge and help (5) ______an end to leftie discrimination once and for all

Câu 41:

Read the following passage and choose the best answer (A, B, C, D):
Left-handers are the odd ones out. Sure, lefties (1) ______up about 10 percent of the population but, frankly, it seems like society has forgotten about them. Just consider all of the right-handed gadgets, awkwardly designed desks, and cooking tools that fit comfortably only in your right hand. What (2)______someone to become a lefthand? Scientists aren’t exactly sure, but research points to a complex (3)______between genes and environment While no exact set of “leftie genes” have been discovered, people who dominantly use their left hands do have more left-handed family members. And researchers have found different brain wirings in righties vs. lefties. But no matter (4) ______it is that drives someone to use their antipodal paw, science has also uncovered a particular set of personality traits that left-handed people tend to have. So for all of you lefties, leftie-loving righties, and ambidextrous folks out there - it’s time to brush up on your left-handed knowledge and help (5) ______an end to leftie discrimination once and for all

Câu 42:

Read the following passage and choose the best answer (A, B, C, D):
Left-handers are the odd ones out. Sure, lefties (1) ______up about 10 percent of the population but, frankly, it seems like society has forgotten about them. Just consider all of the right-handed gadgets, awkwardly designed desks, and cooking tools that fit comfortably only in your right hand. What (2)______someone to become a lefthand? Scientists aren’t exactly sure, but research points to a complex (3)______between genes and environment While no exact set of “leftie genes” have been discovered, people who dominantly use their left hands do have more left-handed family members. And researchers have found different brain wirings in righties vs. lefties. But no matter (4) ______it is that drives someone to use their antipodal paw, science has also uncovered a particular set of personality traits that left-handed people tend to have. So for all of you lefties, leftie-loving righties, and ambidextrous folks out there - it’s time to brush up on your left-handed knowledge and help (5) ______an end to leftie discrimination once and for all

Câu 43:

Read the following passage and choose the best answer (A, B, C, D):
Left-handers are the odd ones out. Sure, lefties (1) ______up about 10 percent of the population but, frankly, it seems like society has forgotten about them. Just consider all of the right-handed gadgets, awkwardly designed desks, and cooking tools that fit comfortably only in your right hand. What (2)______someone to become a lefthand? Scientists aren’t exactly sure, but research points to a complex (3)______between genes and environment While no exact set of “leftie genes” have been discovered, people who dominantly use their left hands do have more left-handed family members. And researchers have found different brain wirings in righties vs. lefties. But no matter (4) ______it is that drives someone to use their antipodal paw, science has also uncovered a particular set of personality traits that left-handed people tend to have. So for all of you lefties, leftie-loving righties, and ambidextrous folks out there - it’s time to brush up on your left-handed knowledge and help (5) ______an end to leftie discrimination once and for all

Câu 44:

Read the following passage and choose the best answer (A, B, C, D):
Not everybody recognizes the benefits of new developments in communications technology. Indeed, some people fear that text messaging may actually be having a negative (1)_____ on young people's communication and language skills, especially when we hear that primary school children may be at (2)______ of becoming addicted to the habit. So widespread has texting become, however, that even pigeons have started doing it. What’s more, in this case, it's difficult to view the results as anything but positive.
Twenty of the birds are about to (3) ______ to the skies with the task of measuring air pollution, each (4) _____ with sensor equipment and a mobile phone. The (5) _____ made by the sensors will be automatically (6) _____ into text messages and beamed to the Internet - where they will appear on a dedicated 'pigeon blog'

Câu 45:

Read the following passage and choose the best answer (A, B, C, D):
Not everybody recognizes the benefits of new developments in communications technology. Indeed, some people fear that text messaging may actually be having a negative (1)_____ on young people's communication and language skills, especially when we hear that primary school children may be at (2)______ of becoming addicted to the habit. So widespread has texting become, however, that even pigeons have started doing it. What’s more, in this case, it's difficult to view the results as anything but positive.
Twenty of the birds are about to (3) ______ to the skies with the task of measuring air pollution, each (4) _____ with sensor equipment and a mobile phone. The (5) _____ made by the sensors will be automatically (6) _____ into text messages and beamed to the Internet - where they will appear on a dedicated 'pigeon blog'.

Câu 46:

Read the following passage and choose the best answer (A, B, C, D):
Not everybody recognizes the benefits of new developments in communications technology. Indeed, some people fear that text messaging may actually be having a negative (1)_____ on young people's communication and language skills, especially when we hear that primary school children may be at (2)______ of becoming addicted to the habit. So widespread has texting become, however, that even pigeons have started doing it. What’s more, in this case, it's difficult to view the results as anything but positive.
Twenty of the birds are about to (3) ______ to the skies with the task of measuring air pollution, each (4) _____ with sensor equipment and a mobile phone. The (5) _____ made by the sensors will be automatically (6) _____ into text messages and beamed to the Internet - where they will appear on a dedicated 'pigeon blog'

Câu 47:

Read the following passage and choose the best answer (A, B, C, D):
Not everybody recognizes the benefits of new developments in communications technology. Indeed, some people fear that text messaging may actually be having a negative (1)_____ on young people's communication and language skills, especially when we hear that primary school children may be at (2)______ of becoming addicted to the habit. So widespread has texting become, however, that even pigeons have started doing it. What’s more, in this case, it's difficult to view the results as anything but positive.
Twenty of the birds are about to (3) ______ to the skies with the task of measuring air pollution, each (4) _____ with sensor equipment and a mobile phone. The (5) _____ made by the sensors will be automatically (6) _____ into text messages and beamed to the Internet - where they will appear on a dedicated 'pigeon blog'

Câu 48:

Read the following passage and choose the best answer (A, B, C, D):
Not everybody recognizes the benefits of new developments in communications technology. Indeed, some people fear that text messaging may actually be having a negative (1)_____ on young people's communication and language skills, especially when we hear that primary school children may be at (2)______ of becoming addicted to the habit. So widespread has texting become, however, that even pigeons have started doing it. What’s more, in this case, it's difficult to view the results as anything but positive. Twenty of the birds are about to (3) ______ to the skies with the task of measuring air pollution, each (4) _____ with sensor equipment and a mobile phone. The (5) _____ made by the sensors will be automatically (6) _____ into text messages and beamed to the Internet - where they will appear on a dedicated 'pigeon blog'

Câu 49:

Read the following passage and choose the best answer (A, B, C, D):
Not everybody recognizes the benefits of new developments in communications technology. Indeed, some people fear that text messaging may actually be having a negative (1)_____ on young people's communication and language skills, especially when we hear that primary school children may be at (2)______ of becoming addicted to the habit. So widespread has texting become, however, that even pigeons have started doing it. What’s more, in this case, it's difficult to view the results as anything but positive. Twenty of the birds are about to (3) ______ to the skies with the task of measuring air pollution, each (4) _____ with sensor equipment and a mobile phone. The (5) _____ made by the sensors will be automatically (6) _____ into text messages and beamed to the Internet - where they will appear on a dedicated 'pigeon blog'.

Câu 50:

Read the following passage and choose the best answer (A, B, C, D):
From the seeds themselves to the machinery, fertilizers and pesticides - The Green Revolution regimen depend heavily on technology. One (1) ________, however, depends much more on technology - organic farming. Many organic farmers use machinery, but (2) _______ chemical fertilizers or pesticides. (3) ________ chemical soil enrichers, they use animal manure and plant parts not used as food - natural, organic fertilizers that are clearly a renewable (4) _______. Organic farmers also use alternatives for pesticides; for example, they may rely (5) _______ natural predators of certain insect pests. Then, the need arises, they can buy the eggs and larvae of these natural predators and introduce them into their crop fields