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Cooking shows on TV are usually all about exotic foods. Thanks to globalization, people everywhere are introducing their taste buds to dishes from every corner of the world. At the same time, other people are discovering that food from their area is the best kept secret. In the past few years, this movement of purchasing local produce keeps picking up steam because it offers a lot of benefits. For starters, local food is often tastier because it is fresher. Goods that are imported from abroad must be flown or shinped in from far away, so they naturally lose some of their freshness during the journey. A simple way to test this is to sample a banana from overseas versus one that was grown locally and compare the tastes. Imported goods must also be washed and packaged in plastic or other containers so they can survive the journey. These materials may cause the nutritional value of these goods to decline during the shipping process. Food safety is another reason why people are choosing local produce. Today's laws regarding foods vary from country to country. This causes confusion and makes it difficult to detect if any harmful pesticides were used. When you know the local farmer who grows your food and the fields that are used to produce it, the chances of it being contaminated are greatly reduced.
Buying local foods can also have beneficial impact on the environment. By supporting local growers, consumers can maintain green space and farmland in their communities. Buying locally also helps to build the local community. If farmers can sell directly to consumers instead of a middleman, they will earn more money for their families. Additional profits also enable farmers to better care for their soil and keep quality standards high. In the end, it is a win-win situation for both parties.
If you are interested in incorporating more local foods into your diet, you can start by attending a farmers' market in your area. This is an open market where farmers sell fruits, vegetables, and meat directly to the public. If you have any questions about the production process or quality of these goods, you can ask the farmers directly. Once you experience the freshness of local foods for yourself, it might be tough to go back to the supermarket.

The tone of the passage is     .

Read the following passage and choose A, B, C, or D to indicate the correct word or phrase that best fits each of the following blanks.
The reality of an interview is never as bad as your fears. For some reason people imagine the interviewer is going to jump on every tiny mistake they (1) .................... . In truth, the interviewer is as keen for the meeting to go well as you are. It is what makes his or her job enjoyable.
The secret of a good interview is preparing for it. What you wear is always important as it creates the first impression. So (2).................... neatly, but comfortably. Make sure that you can deal with anything you are asked. Prepare for questions that are certain to come up, for example: Why do you want to become a nurse? What is the most important quality a good nurse should have? Apart from nursing, what other careers have you considered? What are your interest and hobbies?
Answer the questions fully and precisely. For instance, if one of your interests is reading, be prepared to talk about the sort of books you like. (3).................... , do not learn all your answers off (4) .................... heart. The interviewer wants to meet a human being, not a robot. Remember, the interviewer is genuinely interested in you, so the more you relax and are yourself, the more (5)....................  you are to succeed.

(3).................... , do not learn all your

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Most people need some preparation before they are ready for the workforce, and planning should begin long before it is time to start a career.
Many high school students don't yet know what they want to do. High school is a great time to start thinking about careers. Settling on just one occupation in high school isn't necessary, but they should know how to explore careers and put time into investigating them and learning about their skills and interests.
Understanding what you enjoy what you are good at is the first step in exploring careers. It is important to think about what you like to do because work will eventually be a big part of your life. Once you have thought about the subjects and activities you like best, the next step is to look for careers that put those interests to use. If you love sports, for example, you might consider a career as a gym teacher, or coach.
Another approach to identifying potential career interests is to consider local employers and the types of jobs they have. There are many jobs in manufacturing and healthcare near the high school. Talking directly to workers can help you get information about what they do. If you don't know workers in occupations that interest you, ask people such as your parents, friends, or teacher for their contacts.
If job shadowing give you taste of what an occupation is like, imagine how helpful getting experience could be. Students can begin getting career-related experiences in high school through internships, employment, and other activities. Completing an internship is an excellent way to get experience. Internships are temporary, supervised assignments designed to give student practical job training.

The word “manufacturing” in paragraph 4 means     .

Choose the letter A, B, C or D to answer these following questions

   Dinosaurs were reptiles that lived during a period of earth’s history called the Mesozoic Era, which is also known as the Age of Reptiles. The first dinosaurs appeared more than 200 million years ago. For many millions of years, they dominated the land with their huge size and strength. Then about 65 million years ago, they died out rather suddenly, never to re-emerge. The word “dinosauras” comes from two Greek words meaning “terrible lizard”. Dinosaurs were not lizards, but their appearance could be truly terrifying. The biggest ones weighed more than ten times as much as a mature elephant and nearly equalled the size of most modern-day whales. The famous kinds of dinosaurs, including the brontosaur and tyrannosaurus rex, reached 80 to 90 feet in length. Not all dinosaurs were giant, however, some were actually not larger than a chicken. Scientists still do not know what caused dinosaurs to disappear. One theory involves a change of the earth’s climate. It is believed that temperatures dropped significantly towards the end of the Cretaceous protection, it is possible that the climate became too chilly for dinosaurs. In contrast, other species having protection, such as the mammals and birds, were able to survive.

The author uses the phrase "never to re-emerge" to indicate that the dinosaurs_____.

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Homeopathy, the alternative therapy created in 1796 by Samuel Hahnemann, and now widely used all over the world, is based on the belief that the body can be stimulated to heal itself. A central principle of the “treatment” is that “like cures like”, meaning a subtance that causes certain symptoms can also help to remove those symptoms. Medicines used in homeopathy are created by heavily diluting in water the subtance in question and subsequently shaking the liquid vigorously. They can then be made into tablets and pills. Practitioners believe that the more a subtance is diluted in this way, the greater its power to treat symptoms.
However, in a new study, a working committee of medical experts at Australia’s National Health and Medical Research Council (NHMRC) has claimed that homeopathic medicines are only as effective as placebos at treating illness. Their research, involving the analysis of numerous reports from homeopathy interest groups and the public, concluded that there is no reliable evidence that homeopathy works.
Moreover, researchers uncovered no fewer than 68 ailments that homeopathic remedies had failed to treat, including asthma, sleep disturbances, cold and flu, and arthritis.
As a result of the findings, the NHMRC is urging health workers to inform their patients to be wary of anecdotal evidence that appears to support the effectiveness of homeopathic medicine. “It  isn’t possible to tell whether a health treatment is effective or not simply by considering the experience of one individual or the beliefs of a health practitioner,” says the report. Experts believe that most illnesses said to have been cured by homeopathy would be cured by the body on its own without taking the medicine. Apparently, many illnesses are short-lived by their very nature which often leads to people believing that it is the homeopathy that cures them.
A more serious matter is highlighted by Professor John Dwyer of the University of New South Wales. As an immunologist, he is concerned about homeopathic vaccinations on offer for diseases such as HIV, tuberculosis, and malaria, none of which he considers effective. According to Professor John Dwyer, the concept that homeopathic vaccinations

In Professor John Dwyer’s view, homeopathic vaccinations    .

Choose the word or phrase among A, B, C or D that best fits the blank space in the following passage:

"What does a personal trainer do? I meet each Client to discuss what he or she is looking for. It could be anything from improving general fitness to losing, or in a few cases, (1)……  weight. I then devise a training programme for them which I think will help them to achieve their (2)….. . If they have had anything (3)… with them, say a back injury, I speak to a doctor who will (4)…. me what not to do. If someone eats and drinks too much, it’s easy to suggest they (5)…. , but if that doesn’t (6)....... , I look at their diet. I prefer to train on a one-to-one basis, though I do sometimes work with (7)…. if they are friends and want to train together. Who needs a personal trainer? I think most people do. A trainer will push you to try (8)….. . You achieve 20 percent more than you could train alone, no (9)…… how dedicated you are. I’ve got a lot of Americans on my books, and I actually prefer them. (10)….. most Britons, who still haven’t really got the idea, Americans know how to work out."

6. but if that doesn’t (6)....... , I look at their diet.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions:
In today’s fast-paced industry, learning will most likely involve seeking new skills in ways that challenge the norm. But thankfully, there is a promise for such lifelong learning online - the promise that will save your time and money while helping you earn more of both.
Provided you have access to a decent computer and the Internet, the barrier to getting started is probably lower than it ever has been. And with those things in place, it is a matter of finding the content you wish to learn. So, to help others who may be looking to maximize their own learning efforts, I have listed some quick tips below.
First, set achievable goals. When you start learning, it is a good idea to set goals about what you want to learn or what you might do with your newly acquired knowledge. It might be landing that new job, building a tangible product, or impressing your current management. The goals may vary in size and complexity, but do revisit these goals throughout your learning process. Within a couple weeks, ask yourself: “Am I getting closer to my goal?” or “Am I learning the skills necessary to reach my goals?”. If you are not, then you may need to look elsewhere.
Second, learn with others. By yourself, learning anything has a high propensity to become frustrating. Try teaming up with friends or colleagues. They can often be your best resource for maintaining motivation while you learn.
Third, make it a habit. Online habits often include scrolling through social media or watching videos on YouTube. If you have the downtime for such activities, then you could spend that downtime learning something. And why not learn something? If you do, then you will have plenty more to talk about on social media anyways. So, make learning your new online habit by making a commitment to learn something new each day.

What is the word “commitment” in the last paragraph closest in meaning to?

Read the following passage and choose the best answer for each blank.

After your letter of application and resume, the interview is your best opportunity to (26) _____ the employer - regardless of your background and experience. To do this, use every possible strategy to develop (27) _____ interviewing skills. The best way is to prepare a selective presentation of your background, thoughtful answers to potential interview questions, well-researched questions about the organization, and an effective strategy to introduce yourself. You should also consider your career goals and what the available job offers (28) _____ you can discuss both of these topics with employers. Interviewing is a skill that improves and (29) _____ easier with practice. It is to your advantage to carefully research the job and the organization.                There are many (30) _____ to do this. You can ask for printed materials from the employer, such as annual reports and job descriptions. This is an entirely (31) _____ request, so do not hesitate to make it. Use your library and career center resources. Ask colleagues, friends, and faculty about the organization, and about any personal contacts at the organization they might have. Look at the organization's home page. Knowing about the job will help you prepare a (32) _____ of your qualifications so that you can show, point by point, why you are the best (33) _____. Prepare a clear answer to each of the questions in the interview questions section. Practice answering questions with a friend, or (34) _____ front of a mirror. Ask your friend to give you constructive criticism on your speaking style, mannerisms, and gestures. As you practice, avoid colloquialisms, such as "like" and "you know”. It is (35) _____ to prepare yourself for talking with complete strangers.

(34) _____

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Sometimes people add to what they say even when they don't talk. Gestures are the "silent language" of every culture. We point a finger or move another part of the body to show what we want to say. It is important to know the body language of every country or we may be misunderstood. In the United States, people greet each other with a handshake in a formal introduction. The handshake must be firm. If the handshake is weak, it is a sign of weakness or unfriendliness. Friends may place a hand on the other's arm or shoulder. Some people, usually women, greet a friend with a hug.
Space is important to Americans. When two people talk to each other, they usually stand about two and a half feet away and at an angle, so they are not facing each other directly. Americans get uncomfortable when a person stands too close. They will move back to have their space. If Americans touch another person by accident, they say, "Pardon me." or "Excuse me." Americans like to look the other person in the eyes when they are talking. If you don't do so, it means you are bored, hiding something, or are not interested. But when you are stare at someone, it is not polite. For Americans, thumbs-up means yes, very good, or well done. Thumbs down means the opposite. To call a waiter, raise one hand to head level or above. To show you want the check, make a movement with your hands as if you are signing a piece of paper. It is all right to point at things but not at people with the hand and index finger. Americans shake their index finger at children when they scold them and pat them on the head when they admire them. Learning a culture's body language is sometimes confusing. If you don't know what to do, the safest thing to do is to smile.

The word “them” in paragraph 2 refers to .

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As Hurricane Florence zeroes in on the southeastern US, scientists are warning that climate change is exacerbating the effect of tropical storms. The powerful Category 4 Atlantic weather- front is slow moving, an increasingly common phenomenon that poses a different  manner  of  threat to states in its path. In the event that Florence stalls or comes to a halt altogether over land, it has the potential to deposit catastrophic quantities of rainwater, posing a risk of severe flash flooding.
While the high winds and waves generated by faster storms moving inland from the ocean pose a significant danger to human life and property, the effect of heavy rain can be just as devastating, if not more so. When Hurricane Harvey hit in August 2017, it dropped 60 inches of rain over Houston, Texas, flooding the streets, leaving 93 dead and hundreds more having to be rescued by boat, causing millions of dollars-worth of damage.
James Kossin of the National Oceanic and Atmospheric Administration published a study in  the journal Nature in June suggesting that slow-moving tropical cyclones, which would include those like Florence and Harvey, have become more common over the last 70 years,  dropping in  speed by  10 per cent in that time. According to Mr Kossin, global warming as a result of man-made air pollution is causing the poles to become warmer, which in turn reduces the difference in temperature between the Arctic and Antarctic and the equator, altering atmospheric pressure and slowing down the whipping currents of wind that pass between them and drive hurricanes

Which statement about Hurricane Harvey is probably TRUE according to the passage ?

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions:
Millions of people tune into the weather forecast each evening on televisions. Most of them imagine that the presenter does little more than arrive at the studio a few minutes before the broadcast, read the weather, and then go home.
In fact, this imagine is far from the truth. The two-minute bulletin which we all rely on when we need to know tomorrow’s weather is the result of a hard day’s work by the presenter, who is actually a highly-qualified meteorologist.
Every morning after arriving at the TV studios, the first task of the days is to collect the latest data from the national Meteorological Office. This office provides up-to-the- minute information about weather conditions throughout the day, both in Britain and around the world. The information is very detailed and includes predictions, satellite and radar pictures, as well as more technical data. After gathering all the relevant material from this office, the forecaster has to translate the scientific terminology and maps into images and word which viewers can easily understand.
The final broadcast is then carefully planned. It is prepared in the same way as other programmes. The presenter decides what to say and in what order to say it. Next, a “story board” is drawn up which lay out the script word for word. What make a weather forecast more complicated than other programmes are the maps and electronic images which are required. The computer has to be programmed so that the pictures appear in the correct order during the bulletin.
The time allocated for each broadcast can also alter. This is because the weather report is screened after the news, which can vary in length. The weather forecaster doesn’t always know how much time is available, which means that he/ she has to be thoroughly prepared so that the material can be adapted to the time available.
Another related complication is that the weather forecast has to be a live broadcast; it cannot be pre- recorded. Live shows are very nerve- racking for the presenter because almost anything can go wrong. Perhaps the most worrying aspect for every weather
forecaster is getting the following day’s predictions wrong. Unfortunately for them this is not an unusual occurrence; the weather is not always possible to predict accurately.
The weather is a national obsession in Britain, Perhaps because it is so changeable. It’s the national talking point, and most people watch at least one daily bulletin. It can be mortifying for a weather man or woman who has predicted rain for the morning to wake up to brilliant sunshine. These days, a weather forecaster’s job is even more complicated because they are replied upon to predict other environmental conditions. For example, in the summer the weather forecast has to include the pollen count for hay fever sufferers. Some also include reports on ultraviolet radiation intensity to help people avoid sunburn.
The job of the weather forecaster is certainly far more complicated than just pointing at a map and describing weather conditions. It’s a job for professionals who can cope with stressful and demanding conditions.

Meteorologists get their forecasting information from

Ambient divers are, unlike divers who go underwater in submersible vehicles of pressure resistant suits, exposed to the pressure and temperature of the surrounding ambient water. Of all types of diving, the oldest and simplest is free diving. Free divers may use no equipment at all, but most use a face mask, foot fins, and a snorkel. Under the surface, free divers must hold their breath. Most free divers can only descend 30 to 40 feet, but some skilled divers can go as deep as 100 feet.
Scuba diving provides greater range than free diving. The word scuba stands for self-contained underwater breathing apparatus. Scuba divers wear metal tanks with compressed air or other breathing gases. When using open-circuit equipment, a scuba diver simply breathes air form the tank through a hose and releases the exhaled air into the water. A closed-circuit breathing device, also called a rebreather, filters out carbon dioxide and other harmful gases and automatically adds oxygen. This enables the diver to breathe the same air over and over. In surface-supplied diving, divers wear helmets and waterproof canvas suits. Today, sophiticated plastic helmets have replaced the heavy copper helmets used in the past.These divers get their air from a hose connected to compressors on a boat. Surface-supplied divers can go deeper than any other type of ambient diver.

When using closed-circuit devices, divers .............

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In the American colonies there was little money. England did not supply the colonies with coins and did not allow the colonies to make their own coins, except for the Massachusetts Bay Colony, which received permission for a short period in 1652 to make several kinds of silver coins. England wanted to keep money out of America as a means of controlling trade: America was forced to trade only with England if it did not have the money to buy products from other countries. The result during this pre-revolutionary period was that the colonists used various goods in place of money: beaver pelts, Indian wampum, and tobacco leaves were all commonly used substitutes for money. The colonists also made use of any foreign coins they could obtain. Dutch, Spanish, French, and English coins were all in use in the American colonies.
During the Revolutionary War, funds were needed to finance the world, so each of the individual states and the Continental Congress issued paper money. So much of this paper money was printed that by the end of the war, almost no one would accept it. As a result, trade in goods and the use of foreign coins still flourished during this period.
By the time the Revolutionary War had been won by the American colonists, the monetary system was in a state of total disarray. To remedy this situation, the new Constitution of the United States, approved in 1789, allowed Congress to issue money. The individual states could no longer have their own money supply. A few years later, the Coinage Act of 1792 made the dollar the official currency of the United States and put the country on a bimetallic standard. In this bimetallic system, both gold and silver were legal money, and the rate of exchange of silver to gold was fixed by the government at sixteen to one.

The pronoun “it” in paragraph 2 refers to which of the following

Choose the best answer:
Many young people choose to spend a year or two of their lives while they are still (1)______ living in a foreign country and working as a volunteer. Working as a volunteer means that you cannot only help others, but also develop a (2)______understanding of the world and yourself.

You must have a university degree and (3)______at least one year‟s experience before you can (4)______ . Suitable applicants are invited to attend a series of interviews and are then sent on a training programme. Applicants are usually offered a post (5)______ months and can be sent anywhere from the Sahara to Siberia.

The advantages of being a volunteer far (6)______ the disadvantages. Being a volunteer can enable you to get (7)______ experience that you would otherwise not have had. It can help you move up the career ladder faster. You will make (8)______ friends and return with an appreciation of another culture and language.

However, volunteering is not for everyone. It can be difficult being (9)______ from friends and family. Living on a (10)______ allowance is challenging. But, if you do choose to go, you will return a stronger and wiser person.
7.

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Though Edmund Halley was most famous because of his achievements as an astronomer, he was a scientist of diverse interests and great skill. In addition to studying the skies, Halley was also deeply interested exploring the unknown depths of the oceans. One of his lesser-known accomplishments that was quite remarkable was his design for a diving bell that facilitated exploration of the watery depths.
The diving bell that Halley designed had a major advantage over the diving bells that were in use prior to his. Earlier diving bells could only make use of the air contained within the bell itself, so divers had to surface when the air inside the bell ran low.
Halley's bell was an improvement in that its design allowed for an additional supply of fresh air that enabled a crew of divers to remain underwater for several hours.
The diving contraption that Halley designed was in the shape of a bell that measured three feet across the top and five feet across the bottom and could hold several divers comfortably; it was open at the bottom so that divers could swim in and out at will. The bell was built of wood, which was first heavily tarred to make it water repellent and was then covered with a half-ton sheet of lead to make the bell heavy enough to sink in water. The bell shape held air inside for the divers to breathe as the bell sank to the bottom.
The air inside the bell was not the only source of air for the divers to breathe, and it was this improvement that made Halley's bell superior to its predecessors. In addition to the air already in the bell, air was also supplied to the divers from a lead barrel that was lowered to the ocean floor close to the bell itself. Air flowed through a leather pipe from the lead barrel on the ocean floor to the bell. The diver could breath the air from a position inside the bell, or he could move around outside the bell wearing a diving suit that consisted of a lead bell-shaped helmet with a glass viewing window and a leather body suit, with a leather pipe carrying fresh air from the diving bell to the helmet.

It is NOT stated in the passage that Halley's bell

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The day after Thanksgiving is the start of the holiday shopping season. Thanksgiving is always on a Thursday, so the day after is a Friday. This day has come to be known as Black Friday. It has been the busiest shopping day of the year since 2005.
Most stores offer great deals on Black Friday. They open their doors in the wee hours of the morning. They try to attract shoppers with big discounts. Some items like TVs are much cheaper than usual. Stores may even lose money on these items. They hope that shoppers will buy gifts for other people while they are in the store.
Black Friday is a great time to get good deals. The problem is that there are not enough low-priced items to go around. Each store may only have a few. These items are in high demand. People stand in long lines to get such great deals. They may line up hours before a store opens. They may be hoping to get a low price on a TV or laptop, but not everyone who wants one will get one. Some people leave disappointed. The situation can be tense. Some Black Friday events have been Violent. Large, eager crowds have trampled workers. Fights have broken out or people have been cutting in line. People have shot one another over parking spots. But most Black Friday events are safe and fun. Still, if you plan on going, expect large crowds and a bit of shoving.

What is the. main purpose of the passage?

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks. 
       The (1) _________over vending machines in schools is not new. For a long time, regional governments and public schools have been deliberating on whether or not it is a good idea to have vending machines in schools. In America, (2) ______, only one state has banned these machines in its public schools. Around the country, however, most state schools have different rules about how many and how often vending machines should be accessible to students. Although some people believe that having these drink and snack machines in schools is a good idea, others (3)_________ that there are many disadvantages, too.
      Doctors and other health workers, for instance, suggest that the main disadvantage of having vending machines in schools is based on health and (4)________. They cite statistics that show school – aged children have poorly balanced diets, often due to eating too much fast food. If vending machines are introduced to schools, children will have yet another option for eating unhealthy foods. In a survey of vending machines sales across the country, it was found that sweet drinks like colas and sugary snacks like candy bars were the biggest sellers. Sugary foods and drinks commonly cause obesity in consumers. Opponents of vending machines in schools worry that we are teaching children to be obese. (5)__________the problem of childhood obesity, it is plausible to say that children’s health problems will only get worse if vending machines are followed in schools.

(5)......................

Read the passage below and decide whether the statements are TRUE or FALSE?

   In 1981, the Association of Zoos and Aquariums (AZA) created a Species Survival Plan (SSP) in order to help preserve specific endangered and threatened species through captive breeding. With over 450 SSP Plans, there are a number of endangered species that are covered by the AZA with plans to cover population management goals and recommendations for breeding for a diverse and healthy population, created by Taxon Advisory Groups. These programs are commonly created as a last resort effort. SSP Programs regularly participate in species recovery, veterinary care for wildlife disease outbreaks, and a number of other wildlife conservation efforts. The AZA's Species Survival Plan also has breeding and transfer programs, both within and outside of AZA - certified zoos and aquariums. Some animals that are part of SSP programs are giant pandas, lowland gorillas, and California condors.

   Some animals that are part of SSP programs are giant pandas, lowland gorillas, and California condors.

With over 450 SSP Plans, there are a number of endangered species that are covered by the AZA with plans to cover population management goals and recommendations for breeding for a diverse and healthy population

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Continents and ocean basins represent the largest identifiable bodies on Earth. On the solid portions of the planet, the second most prominent features are flat plains, elevated plateaus, and large mountain ranges. In geography, the term "continent" refers to the surface of continuous landmasses that together comprise about 29.2% of the planet's surface. On the other hand, another definition is prevalent in the general use of the term that deals with  extensive main lands, such as Europe or Asia, that actually represent one   very large landmass. Although all continents are bounded by the water bodies or high mountain ranges, isolated main lands, such as Greenland and India-Pakistan areas are called subcontinents. In some circles, the distinction between continents and large islands lies almost exclusively in the size of a particular landmass.
The analysis of compression and tension in the earth's crust has determined that continental structures are composed of layers that underlie continental shelves. A great deal of disagreement among geologists surrounds the issue of exactly how many layers underlie each landmass because of their distinctive mineral and chemical composition. It's also quite possible that the ocean floor rests on top of unknown continents that have not yet been explored. The continental crust is believed to have been formed by means of a chemical reaction when lighter materials separated from heavier ones, thus settling at various levels within the crust. Assisted by the measurements of the specifics within crust formations by means of monitoring earthquakes, geologists can speculate that a chemical split occurred to form the atmosphere, sea water and the crust before it solidified many centuries ago.
Although each continent has its special features, all consist of various combinations of components that include shields, mountain belts, intra - cratonic basins, margins, volcanic plateaus, and block-vaulted belts. The basic differences among continents lie in the proportion and the composition of these features relative to the continent size. Climatic zones have a crucial effect on the weathering and formation of the surface features, soil erosion, soil deposition, land formation, vegetation, and human activities.
Mountain belts are elongated narrow zones that have a characteristic folded sedimentary organization of layers. They are typically produced during substantial crustal movements, which generate faulting and mountain building. When continental margins collide, the rise of a marginal edge leads to the formation of large mountain ranges, as explained by the plate tectonic theory. This process also accounts for the occurrence of mountain belts in ocean basins and produces evidence for the ongoing continental plate evolution.

According to the passage, what are the differences in the structure of continents?

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   Earth is richly supplied with different types of living organisms which co-exist in their environments, forming complex, interrelated communities. Living organisms depend on one another for nutrients, shelter, and other benefits. The extinction of one species can set off a chain reaction that affects many other species, particularly if the loss occurs near the bottom of the food chain. For example, the extinction of a particular insect or plant might seem inconsequential. However, there may be fish or small animals that depend on that resource for foodstuffs. The loss can threaten the survival of these creatures and larger predators that prey upon them. Extinction can have a ripple effect that spreads throughout nature.

   In addition to its biological consequences, extinction poses a moral dilemma for humans, the only species capable of saving the others. The presence of humans on the planet has affected all other life forms, particularly plants and animals. Human lifestyles have proven to be incompatible with the survival of some other species. Purposeful efforts have been made to eliminate animals that prey on people, livestock, crops, or pose any threat to human livelihoods. Some wild animals have been decimated by human desire for meat, hides, fur, or other body parts with commercial value. Likewise, demand for land, water, and other natural resources has left many wild plants and animals with little to no suitable habitat. Humans have also affected nature by introducing non-native species to local areas and producing pollutants having a negative impact on the environment. The combination of these human-related effects and natural obstacles such as disease or low birthrates has proven to be too much for some species to overcome. They have no chance of survival without human help.

   As a result, societies have difficult choices to make about the amount of effort and money they are willing to spend to save imperiled species. Will people accept limits on their property rights, recreational activities, and means of livelihood to save a plant or an animal? Should saving such popular species as whales and dolphins take priority over saving obscure, annoying, or fearful species? Is it the responsibility of humans to save every kind of life form from disappearing, or is extinction an inevitable part of nature, in which the strong survive and the weak perish? These are some difficult questions that people face as they ponder the fate of other species living on this planet.

Which of the following can be inferred from the passage?