Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word(s) for each of the blanks from 41 to 45.
The United States has many different types of families. While most American families are traditional,(41)_________ a father, mother and one or more children, 22 percent of all American families in 1998 were headed by one parent, usually a woman. In a few families in the United States, there are no children. These childish couples may believe that they would not make good parents; they may want freedom from the (42)_________ of childbrearing or, perhaps they (43)_________ physically able to have children. Other families in the United States have one adult (44)_________ a stepparent. A stepmother or stepfather is a       person who joins a family by marrying a father or mother Americans tolerate and accept these different types of families. In the United States, people have the right to privacy and Americans do not believe in telling other Americans what type of family group they must belong to. They respect each other’s (45) _________ regarding family groups. Families are very important to Americans.
(41)...................

Read the following passage and mark the letter A, B, C, or D to indicate the correct word or phrase that best fits each of the numbered blanks.

A scientist said robots will be more intelligent than humans by 2029. The scientist's name is Ray Kurzweil. He works for Google as Director of Engineering. He is one of the world's (1)______ experts on artificial intelligence (A.I.). Mr Kurzweil believes computers will be able to learn from experiences, just like humans. He also thinks they will be able to tell jokes and stories, and even flirt. Kurzweil's 2029 prediction is (2)______ sooner than many people thought. The scientist said that in 1999, many A.I. experts said it would be hundreds of years before a computer was more intelligent than a human. He said that it would not be long before computer intelligence is one billion times more powerful than the human brain.

Mr Kurzweil joked that many years ago, people thought he was a little crazy (3)______ predicting computers would be as intelligent as humans. His thinking has (4)______ the same but everyone else has changed the way they think. He said: "My views are not radical any more. I've actually stayed consistent. It's the (5)______ of the world that's changing its view." He highlighted examples of high-tech things we use, see or read about every day. These things make us believe that computers have intelligence. He said people think differently now: "Because the public has seen things like Siri [the iPhone's voice-recognition technology] where you talk to a computer; they've seen the Google self-driving cars."

(1) ______

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.

All living things require energy to do the work necessary for survival and reproduction. But what is energy? Energy is simply the ability to do work, (1) ......... work is done when a force moves an object. Let's consider your own needs for a moment. You need energy to turn on and turn off your computer. You need energy to (2).......... of bed in the morning. And, yes, you need energy to reproduce. So where does energy come from and how do we use it? On Earth, energy ultimately comes from the sun. Plants use the sun's energy to make sugar. Organisms, in turn, use sugar as a (3) ........... of energy to do work.

Plants use energy from sunlight to make sugar and oxygen from carbon dioxide and water. The process by which carbon dioxide and water are (4) .......... to sugar and oxygen using sunlight is referred to as photosynthesis. This is an endergonic reaction, meaning energy is required by the reaction. Specifically, energy is required to put the carbon dioxide and the water molecules together to form sugar. Sun (5).........the energy needed to drive photosynthesis, and some of the energy used to make the sugar is stored in the sugar molecule.

(study.com/energy-and-life-the–transformation-of-energy-in-living)

(4) __________

Read the following pasage and decide which answer (A, B, C or D) best fits each space from 1 to 5.
With job vacancies available all year round offering high salaries, Vietnam has been ranked the second best place in the world to teach English by TEFL Exchange, a community for teachers of English           (1)_________ a foreign language.
The site (2)_________ that a foreign English teacher can earn between $1,200-2,200 a month in Vietnam, where the average annual income in 2016 was just $2,200. They can (3)_________ a job any time of year and the best places to do so are the country’s three largest cities: Hanoi, Ho Chi Minh City and Da Nang.
Candidates only need to hold a bachelor’s (4)_________ and a TEFL  (Teaching  English as a Foreign Language) certificate.
English is an obligatory subject from sixth grade across Vietnam, but in large cities, many primary schools demand high (5)_________ . Foreign language centers have been thriving here, with students as young as three years old.
(4)...................

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.

Imagine you are buying an apple in a supermarket. Which do you choose, one with a small bro or one without? Be honest - you'd go for the apple (1) _________looks perfect. Supermarkets do this too on a much larger scale when buying fruit and vegetables from farmers. And what (2) ______of the on with marks on them? They are thrown away. So are the ones that are a funny shape or size.

(3) _______ reason for waste is that people buy more food than they can eat and supermarkets de everything they can to encourage this, for example with offers like 'Buy one, get one free'. Developed countries waste about 650 million tons of food each year and so do developing countries. (4) _____the waste happens for very different reasons. As the world's population grows, this problem will only (5) _________ so we need to take action urgently.

(Adapted from Navigate)

(4) ________

Read the following passage and choose the correct answer to each of the questions.

The word "robot" first appeared in a 1921 stage play by Czech writer Karel Capek. In the play, a man makes a machine that can think, which he calls a robot and which ends up killing its owner. In the 1940s, the American science fiction writer, Isaac Asimov, wrote a series of stories about robots and invented the term 'robotics', the science of robots. Meanwhile, in the real world, the first robots were developed by an engineer, Joseph F. Engelberger, and an inventor, George C. Devol. Together they started Unimation, a manufacturing company that produced the first real robot in 1961, called the Unimate. Robots of this type were installed at a General Motors automobile plant and proved to be a success. They worked reliably and saved money for General Motors, so other companies were soon acquiring robots as well.

These industrial robots were nothing like the terrifying creatures that can often be seen in science fiction films. In fact, these robots looked and behaved nothing like humans. They were simply pieces of computer-controlled machines, with metal "arms" or "hands". Since they were made of metal, they could perform certain jobs that were difficult or dangerous for humans, particularly jobs that involve high heat. And since robots were tireless and never got hungry, sleepy, or distracted, they were useful for tasks that would be tiring or boring for humans. Industrial robots have been improved over the years, and today they are used in many factories around the world. Though the use of robots has meant the loss of some jobs, at the same time other jobs have been created in the design, development, and production of the robots.

Outside of industry, robots have also been developed and put into use by governments and scientists in situations where humans might be in danger. For example, they can be sent in to investigate an unexploded bomb or an accident at a nuclear power plant. Researchers also use robots to collect samples of hot rocks or gases in active volcanoes. In space exploration, robots have performed many key tasks where humans could not be present, such as on the surface of Mars. In 2004, two robotic Rovers, small six-wheeled computerized cars, were sent to Mars.

What can be inferred from the passage about robots?

Course numbers are an indication of which courses are to various categories of students at the University. Undergraduate courses with the numbers 100 or 200 are generally introductory courses appropriate for freshmen or sophomores, whereas courses with the numbers 300 or 400 often have prerequisites and are often to juniors and seniors only. Courses with the numbers 800 or above are open only to graduate students. Certain graduate courses, generally those devoted to introductory material, are numbered 400 for undergraduate students who qualify to take them and 600 for graduate students. Courses designed for students seeking a professional degree carry a 500 number for undergraduate students and a 700 number for graduate students. Courses numbered 99 or below are special interest courses that do not carry academic credit. If students elect to take a special interest course, it will not count toward the number of hours needed to complete graduation requirements.
Full - time undergraduate student is expected to take courses that total twelve to eighteen credit hours. A full-time graduate student is expected to take courses that total ten to sixteen credit hours. Student holding assistantships are expected to enroll for proportionately fewer hours. A part - time graduate may register for minimum of three credit hours. An overload, that is, more than the maximum number of hours, may be taken with the approval of an academic advisor. To register for an overload, students must submit the appropriate approval form when registering. Overloads above 24 hours will not be approved under any circumstances.

What is the 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 following questions.

Let children learn to judge their own work. A child learning to talk does not learn by being corrected all the time. If corrected too much, he will stop talking. He notices a thousand times a day the difference between the language he uses and the language those around him use. Bit by bit, he makes the necessary changes to make his language like other people's. In the same way, children learn all the other things they learn to do without being taught - to talk, run, climb, whistle, ride a bicycle - compare their own performances with those of more skilled people, and slowly make the needed changes. But in school we never give a child a chance to find out his mistakes for himself, let alone correct them. We do it all for him. We act as if we thought that he would never notice a mistake unless it was pointed out to him, or correct it unless he was made to. Soon he becomes dependent on the teacher. Let him do it himself. Let him work out, with the help of other children if he wants it, what this word says, what the answer is to that problem, whether this is a good way of saying or doing this or not.

If it is a matter of right answers, as it may be in mathematics or science, give him the answer book. Let him correct his own papers. Why should we teachers waste time on such routine work? Our job should be to help the child when he tells us that he can't find the way to get the right answer. Let's end all this nonsense of grades, exams, and marks. Let us throw them all out, and let the children learn what all educated persons must someday learn, how to measure their own understanding, how to know what they know or do not know.

Let them get on with this job in the way that seems most sensible to them, with our help as school teachers if they ask for it. The idea that there is a body of knowledge to be learnt at school and used for the rest of one's life is nonsense in a world as complicated and rapidly changing as ours. Anxious parents and teachers say, “But suppose they fail to learn something essential, something they will need to get on in the world?" Don't worry! If it is essential, they will go out into the world and learn it.

What does the author think teachers do which they should not do?

SHOPPING MALLS
Victor Gruen, an American architect, revolutionized shopping in the 1950s by creating the type of shopping centre that we now call a shopping mall.
Gruen's (31) _______ was to provide a pleasant, quiet and spacious shopping environment with large car parks, which usually meant building in the suburbs. He also wanted people to be able to shop in all kinds of weather. He (32) _______ on using building designs that he knew people would feel comfortable with, but placed them in landscaped ‘streets’ that were entirely enclosed and often covered with a curved glass roof. This was done to (33) _______ some of the older shopping arcades of city centres, but while these housed only small speciality shops, Gruen's shopping malls were on a much grander scale.
Access to the whole shopping mall was gained by using the main doors, which (34) _______ the shopping ‘streets’ from the parking areas outside. As there was no need to keep out bad weather, shops no longer needed windows and doors, and people could wander (35) _______ from shop to shop. In many cities, shopping malls now contain much more than just shops; cinemas, restaurants and other forms of entertainment are also growing in popularity.
(35)..............................................................

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.

Since the invention of the Internet, the world has become a different place. People are sending messages, apparently up to 60 billion a day, and it usually takes only seconds to deliver them. (1) _________are we now forgetting how to communicate face-to-face?

Without a doubt there are (2) _________ challenges, but there are also examples of when the Internet has changed someone's life for the better. Look at Tara Taylor's case, a mother (3) ___________ lives in the USA: when she uploaded a photo of her daughter to Facebook, a facefriend (4) ______a problem with one of the child's eyes, so Tara took her to the doctor. It turned out that the girl had a rare disease, but her sight was saved! The story of communication is, in many (5) _______, the story of the human race: we have always shared knowledge and built relationships, whatever means of communication we use.

(Adapted from High Note)

(5) ________

Read the following passage and choose the correct answer to each of the questions.

The word "robot" first appeared in a 1921 stage play by Czech writer Karel Capek. In the play, a man makes a machine that can think, which he calls a robot and which ends up killing its owner. In the 1940s, the American science fiction writer, Isaac Asimov, wrote a series of stories about robots and invented the term 'robotics', the science of robots. Meanwhile, in the real world, the first robots were developed by an engineer, Joseph F. Engelberger, and an inventor, George C. Devol. Together they started Unimation, a manufacturing company that produced the first real robot in 1961, called the Unimate. Robots of this type were installed at a General Motors automobile plant and proved to be a success. They worked reliably and saved money for General Motors, so other companies were soon acquiring robots as well.

These industrial robots were nothing like the terrifying creatures that can often be seen in science fiction films. In fact, these robots looked and behaved nothing like humans. They were simply pieces of computer-controlled machines, with metal "arms" or "hands". Since they were made of metal, they could perform certain jobs that were difficult or dangerous for humans, particularly jobs that involve high heat. And since robots were tireless and never got hungry, sleepy, or distracted, they were useful for tasks that would be tiring or boring for humans. Industrial robots have been improved over the years, and today they are used in many factories around the world. Though the use of robots has meant the loss of some jobs, at the same time other jobs have been created in the design, development, and production of the robots.

Outside of industry, robots have also been developed and put into use by governments and scientists in situations where humans might be in danger. For example, they can be sent in to investigate an unexploded bomb or an accident at a nuclear power plant. Researchers also use robots to collect samples of hot rocks or gases in active volcanoes. In space exploration, robots have performed many key tasks where humans could not be present, such as on the surface of Mars. In 2004, two robotic Rovers, small six-wheeled computerized cars, were sent to Mars.

What is the author's attitude towards robots in this passage?

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrases that best fits each of the numbered blanks.
Parents and teachers are always smaking (31)________ between the time when they were children and the present generation . They say everything was better than it is today, especially ineducation. (32)________ , they say they used to work much harder in school, and that nowadays, we aren't  very interested. I disagree, because we spend hours every day doing homework after our lessons or (33)________ for exammination. I wonder (34)________ our parents really had to study somuch after school every day. In my opinion, it is no exaggeration to say we have forgotten how to play. I think one reason whykids (35)________ in class is because they need to get rid ofstress.
(33).....................

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
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 (16)       adequately in most conditions.
In cold climates, the problem is that the head is (17)           heat all the time. As much as fifty to sixty per cent of your body‟s heat is lost through the head and neck, (18)      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, (19)       buying one that has a drop down tail at the back to stop your neck getting sunburnt.
And in wet weather  (20)         ,  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.
(17)..........................

 Choose the item among A, B, C or D that best answers the question about the passage:

"Books which give instructions on how to do things are very popular in the United States today. Thousands of these How-to books are useful: in fact, there are about four thousand books with titles that begin with the words “How to”. One book, may tell you how to earn more money, another may tell you how to save or spend it, and another may explain how to give your money away.
 Many How-to books give advice on careers. They tell you how to choose a career and how to succeed in it. If you fail, however, you can buy the book “How to Turn Failure into Success”. If you would like to become very rich, you can buy the book “How to Make a Millionaire”. If you never make any money at all, you may need a book called “How to Live on Nothing”.
 One of the most popular types of books is one that helps you with personal problems. If you want to have a better love of life, you can read “How to Succeed in Love every Minute of Your Life”. If you tired of books on happiness, you may prefer books which give step-by-step instructions on how to redecorate or enlarge a house.
 Why have How-to books become so popular? Probably because life has become so complex. Today people have far more free time to use, more choices to make, and more problems to solve. How-to books help people deal with modern life."

3. If you often read How-to books, you ………

Read the text and choose the best answer (A, B, C or D) to each of the questions. 
Poles Apart
Many are surprised to learn that Antarctica is nearly twice the size of the United States. The name Antarctica was coined to mean "opposite to the Arctic." It is just that in many ways. Antarctica is a high, ice-covered landmass. In the Arctic the landmasses are grouped around the ice-covered Arctic Ocean.
Largely because of this difference, the climate of the two areas is very different. Antarctica is the coldest area in the world. On the average it is about 30 degrees colder than the Arctic. At the South Pole, nearly 10.000 feet high, monthly mean temperatures run well below zero. Only in coastal regions do temperatures sometimes rise about freezing in the summer (December to March). In contrast, near the North Pole monthly mean temperatures often rise above freezing. 
At both poles, daily temperatures may drop far below the monthly mean. At the American South Pole Station, winter temperatures sometimes fall below -100 degrees Fahrenheit. Elsewhere, on higher parts of the south polar plateau, even lower temperatures are recorded.
A temperature of -127 degrees Fahrenheit was measured in August 1960. It is the world's record low temperature.
Partly because of this climatic difference, the land animals and plants of the two regions are very different. On the continent of Antarctica, there are very few plants. In the Arctic there are many plants. In some of the few ice-free areas of Antarctica, mosses, lichens, and algae are found. Penguins populate Antarctic coastlines but do not exist in the Arctic. The land animals of the Arctic are foxes, bears, reindeer, and lemmings. These animals are unknown in the Antarctic. Old rock layers show that this "oppositeness" between north and south extends far back into the early chapters of earth history.
Ice is the great feature of Antarctica. More than 4.5 million square miles of ice sheet cover the area. Great rivers of ice, called glaciers, push down the mountains. Antarctica is the storehouse of about 85 percent of the total world supply of ice. 
The icecap is very thick, averaging nearly 8,000 feet. At one spot, scientists have found the distance from the surface to the rock underneath the ice to be more than 13,000 feet.
If this great volume of ice were to melt, the volume of the world oceans would increase, and sea level would rise. Extreme atmospheric changes would have to take place for this to happen.

The author implies that if Antarctica's ice melted _________.

Light from a living plant or animal is called bioluminescence, or cold light, to distinguish it from incandescence or heat-generating light. Life forms could not produce incandescent light without being burned. Their light is produced in chemicals combining in such a way that little or no measurable heat is produced, and the life forms generating it are unharmed. Although bioluminescence is a relatively complicated process, it can be reduced to simple terms. Living light occurs when luciferin and oxygen combine in the presence of luciferase. In a few cases, fireflies the most common, an additional compound called ATP is required.

The earliest recorded experiments with bioluminescence in the late 1800s are attributed to Raphael Dubois, who extracted a luminous fluid from a clam, observing that it continued to glow in the test tube for several minutes. He named the substance luciferin, which means “the bearer of life”. In further research, Dubois discovered that several chemicals were required for bioluminescence to occur. In his notes, it was recorded that a second important substance, which he called luciferase, was always present. In later study of small, luminous sea creatures, Newton Harley concluded that luciferin was composed of carbon, hydrosen, and oxygen, which are the building blocks of all living cells. He also proved that there are a variety of luciferin and luciferase, specific to the plants and animals that produce them.

Much remains unknown, but many scientists who are studying bioluminescence now believe that the origin of the phenomenon may be traced to a time when there was no oxygen in the Earth’s atmosphere. When oxygen was gradually introduced to the atmosphere, it was actually poisonous to life forms, plants and animals produced light to use up the oxygen in a gradual but necessary adaptation. It is speculated that millions of years ago, all life may have produced light to survive. As the millennia passed, life forms on Earth became tolerant of, and finally dependent on oxygen, and the adaptation that produced bioluminescence was no longer necessary, but some primitive plants and animals continued to use the light for new functions such as mating or attracting prey.

Which of the following is the main topic of the passage?

Choose the item among A, B, C or D that best answers the question about the passage:

"A good deal of fascinating research has been done about the reading patterns of young people, and it is surprising to discover at what an early age children start expressing preferences for particular kinds of books. A recent report which examined in detail the reading habits of primary-school children, showed that even seven-year-old boys and girls have clear views about what they want to read. Girls, in general, read more, and far more girls than boys preferred reading stories. Boys were showing a taste for the more instant appeal of picture stories, or else books about their hobbies.
 These tastes continue unchanged until girls are teenagers. Apparently girls read more in general, but more fiction in particular. You could say that there are more opportunities for girls to read fiction: magazines encourage the fiction habits in girls in their early teens, and by their late teens they have probably moved on to the adult women’s magazines. Teenage boys tend to buy magazines about their hobbies: motorcycles, heavy transport and so on.
 Adult reading tastes are also the subject of research. Again the number of women who read for pleasure is considerably higher than the number of men. Ít seems that the majority of women still want love stories. There has also been some analysis of what men actually read. Apparently only 38 percent of men read anything, but 50 percent of what they read is fiction in the form of action-packed stories of space or gunmen."

1. Recent research into children’s reading has showed that they …….

Humans have struggled against weeds since the beginnings of agriculture. Marring our gardens is one of the milder effects of weeds - any plants that thrive where they are unwanted. They clog waterways, destroy wildlife habitats, and impede farming. Their spread eliminates grazing areas and accounts for one-third of all crop loss. They compete for sunlight, nutrients, and water with useful plants.

The global need for weed control had been answered mainly by the chemical industry. Its herbicides are effective and sometimes necessary, but some pose serious problems, particularly if misused. Toxic compounds threaten animal and public health when they accumulate in food plants, groundwater, and drinking water. They also harm workers who apply them.

In recent years, the chemical industry has introduced several herbicides that are more ecologically sound. Yet new chemicals alone cannot solve the world’s weed problems. Hence, scientists are exploring the innate weed-killing powers of living organisms, primarily insects and microorganisms.

The biological agents now in use are environmentally benign and are harmless to humans. They can be chosen for their ability to attack selected targets and leave crops and other plants untouched. In contrast, some of the most effective chemicals kill virtually all the plants they come in contact with, sparing only those that are naturally resistant or have been genetically modified for resistance. Furthermore, a number of biological agents can be administered only once, after which no added applications are needed. Chemicals typically must be used several times per growing season.

With what topic does this passage primarily deal?

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.

   The countryside of Britain is well known for its beauty and many contrasts: its bare mountains and moorland, its lakes, rivers and woods, and its long, often wild coastline. Many of the most beautiful areas are national parks and are protected from development. When British people think of the countryside they think of farmland, as well as open spaces. They imagine cows or sheep in green fields enclosed by hedges or stone walls, and fields of wheat and barley. Most farmland is privately owned but is crossed by a network of public footpaths.

   Many people associate the countryside with peace and relaxation. They spend their free time walking or cycling there, or go to the country for a picnic or a pub lunch. In summer people go to fruit farms and pick strawberries and other fruit. Only a few people who live in the country work on farms. Many commute to work in towns. Many others dream of living in the country, where they believe they would have a better and healthier lifestyle.

   The countryside faces many threats. Some are associated with modern farming practices, and the use of chemicals harmful to plants and wildlife. Land is also needed for new houses. The green belt, an area of land around many cities, is under increasing pressure. Plans to build new roads are strongly opposed by organizations trying to protect the countryside. Protesters set up camps to prevent, or at least delay, the building work.

   America has many areas of wild and beautiful scenery, and there are many areas, especially in the West in states like Montana and Wyoming, where few people live. In the New England states, such as Vermont and New Hampshire, it is common to see small farms surrounded by hills and green areas. In Ohio, Indiana, Illinois and other Midwestern states, fields of corn or wheat reach to the horizon and there are many miles between towns.

   Only about 20% of Americans live outside cities and towns. Life may be difficult for people who live in the country. Services like hospitals and schools may be further away and going shopping can mean driving long distances. Some people even have to drive from their homes to the main road where their mail is left in a box. In spite of the disadvantages, many people who live in the country say that they like the safe, clean, attractive environment. But their children often move to a town or city as soon as they can.

   As in Britain, Americans like to go out to the country at weekends. Some people go on camping or fishing trips, others go hiking in national parks.

What does the word “they” in paragraph 2 refer to?

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.

Imagine you are buying an apple in a supermarket. Which do you choose, one with a small bro or one without? Be honest - you'd go for the apple (1) _________looks perfect. Supermarkets do this too on a much larger scale when buying fruit and vegetables from farmers. And what (2) ______of the on with marks on them? They are thrown away. So are the ones that are a funny shape or size.

(3) _______ reason for waste is that people buy more food than they can eat and supermarkets de everything they can to encourage this, for example with offers like 'Buy one, get one free'. Developed countries waste about 650 million tons of food each year and so do developing countries. (4) _____the waste happens for very different reasons. As the world's population grows, this problem will only (5) _________ so we need to take action urgently.

(Adapted from Navigate)

(2) ________

Read the following passage and mark A, B, C, or D to indicate the correct answer to each  of the blanks.

Modern industry pollutes, and it also seem to cause significant changes to the climate. What is needed is an industry that (41)_________ the benefits without the costs. And the glimmerings of such an industry can now be (42)_________ .
That industry is based on biotechnology. At the moment, biotech‟s main uses are in medicine and agriculture.  However,  its  biggest  long  term impact maybe industrial.  Biotechnology will  (43)_________ demand for oil by taking the cheapest raw materials imaginable, carbon dioxide and water, and using them to make fuel and plastics.
Plastics and fuels made in this way would have several advantages. They can be called “renewable”, (44)_________ nothing is depleted to make them. They would be part of the natural carbon cycle, borrowing    that element from the atmosphere for a few months, and returning it when they were burned or (45)_________ . That means they could not possibly contribute to global warming. They would also be environmentally friendly in other ways.
All in all, the future could be green in ways that traditional environmentalists had not expected.
(41)........................