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Everyone wants to reduce pollution . But the pollution problem is ( 1 ) …………….. complicated as it is serious . It is complited ( 2 ) …………… much pollution is caused by things that benefit people . ( 3)………. , exhaust from automobiles causes a lartge percentage of air pollution . But the automobile (4 ) …..provides transportation for millions of people . Factories discharge much (5)……. the material that pollutes theair and water , but factories give employment to a large munber of people . Thus , to end (6)……… greatly reduce pollution immediately , people would have to ( 7) ….. using many things that benefit them . Most of the people do not want to do that , of course . But pollution can be ( 8) ….. reduced in several ways . Scientists and engineers can work to find ways lessen the (9) ………. Of the pollution that such things as automobiles and factories cause . Governments can pass and enforce laws that (10) ……….businesses and traffic to stop , or to cut down on certain polluting activities

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How many times in the last hundred years or so have people talked of the imminent death of the book? Films were an early threat because they were so effective at telling stories in a visual way. Next there was radio, (26)...... stepped into the mid-twentieth century and provided such an alternative to books as drama, documentaries and discussions. When television arrived, many people believed that it would finish the book off. Nowadays, (27)............ the threat by TV, the book is thought to be endangered by computers and the Internet, and by other technological attractions (28).........  theCD and the video game, too Surely there are now reasons why (29).............  book ought to be dead, or at least very badly injured. If so, why does it not show proper respect for these reportedly less literate times (30)......... die out? There is clearly more than a single answer to this question. Firstly, we have more leisure time than we (31)..........  to, and people are generally living longer, which means there is more time to do more (including reading books). As (32)............ as this, there is the strength of the book as a tradition. We are all too dismissive of traditions in our modern world, but they can have very strong pull (33)....... us. Added to this, the book is such a practical tool: it doesn't cost too (34).......... , it is usually small enough to carry around, and it can easily be (35)......... . We will never go without books, because they have served us so well for so long

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Earth is the only place we know of in the universe that can support human life (1) ______ human activities are making the planet less fit to live on. As the western world carries on consuming two-thirds of the world's resources while half of the world's population do so (2)______ to stay alive we are rapidly destroying the (3)______ resource we have by which all people can survive and prosper. Everywhere fertile soil is (4)______ built on or washed into the sea. Renewable resources are exploited so much that they will never be able to recover (5)______ We discharge pollutants into the atmosphere without any thought of the consequences. As a (6)______ the planet's ability to support people is being reduced at the very time when rising human numbers and consumption are (7)______increasingly heavy demands on it. The Earth's (8)______ resources are there for us to use. We need food, water, air, energy, medicines, warmth, shelter and minerals to (9)______ us fed, comfortable, healthy and active. If we are sensible in how we use the resources they will (10)______ indefinitely. But if we use them wastefully and excessively they will soon run out and everyone will suffer

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People in the United States often shop from catalogs. There are special catalogs for (1)____ every need, including clothing, furniture, health, (2)____ products and things for the kitchen. People also order (3)_____ 40% of their music from music club catalogs. Customers say that music stores are too noisy. Television shopping began in 1986. About 5% to 8% of the American public now shops by television. Some (4)_____shopping channels are the Home Shopping Network and QVC. Customers say that television shopping is (5)____.than shopping in a store. How do they buy things? They (6)______a phone call and charge the item to their credit card. And TV shopping channels are on late at night (7)______people can go shopping anytime. Is computer shopping the way of the future? About 37% of American (8)____now have personal computers. And shopping by computer (or shopping on-line) is (9)______to more people every day. Already, shoppers can use their computers to order many different products, such as computer products, flowers, foods, T-shirts, and posters. And new on- line shopping services (10)________every day. Soon people may be able to shop for anything, anytime, anywhere in the world

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Throughout history people have always communicated with one another, not only by speech but also by movements of the hands and body. It is, however, only (42) ______ the last few years that these aspects of communication have been studied at all widely. This type of communication is known as body language or non-verbal communication. People sometimes wonder (43) ______ you can learn how body language works. It is of course possible to read books on the subject but you also need to (44) ______ time observing people‘s movements. A railway station is a particular good place for such observation, as here people can be seen openly expressing eagerness, sorrow, delight, impatience and many other human emotions by (45) _____ of movement. If you turn down the sound on your television set and try to understand (46) _____ is happening simply by watching the picture you will learn even more about communication (47) _____ words. By turning the sound back up every five (48) ______ or so, it is possible to check how accurate your (49) ______ is. Having studied the art of body language you will have a definite (50) ______ at a boring party. You will be able to sit on your own for the whole evening and thoroughly enjoy yourself by both watching (51) ______ interpreting the body language of all the other people there

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According to the Sleep Council, 20 million people in the UK aren‘t (1)____ enough sleep 3 and some experts now believe that ―sleep debt‖ can impair your metabolism and disrupt hormone levels. To(2) ____ out how (3)_____ you need, says sleep expert Professor Chris Idzikowski, director of the Sleep Assessment and Advisory Service, (4)_____ your alarm for when you (5)______ to get up, then count back six to eight hours, (6) ______ on how much shut-eye you feel you need. Try to go to bed at this time every night, and get up at the same time - even at weekends. If you (7)______ feel tired during the day, go to bed earlier by 15 minutes a week until you wake up refreshed. So if you (8)_____ go to bed at 11 pm, say, go at 10.45 pm for a week. If you‘re still tired, try going at 10.30 the (9)_____ week, and so on. Remember, too: a weekend afternoon nap can help (10)_____ up for any missed hours in the week.

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One of the most urgent environmental problems in the world today is the shortage of clean water. Having clean drinking water is a basic human right. But acid rain, (1) ____ pollution and garbage have made many sources of water undrinkable. Lakes, reservoirs and even entire seas have become vast pools (2) ____ poison. Lake Baikal in Russia is one of the largest lakes in the world. It (3) _____ a rich variety of animals and plants, including 1,300 rare species that do not exist (4)____ else in the world. But they are being destroyed by the massive volumes of toxic effluent which (5) ____ into the lake every day. Even where law existed, the government did not have the power to enforce them. Most industries simply ignore the regulations. The Mediterranean Sea (6)____ 1% of the world's water surface. But it is the dumping (7)____ for 50% of all marine pollution. Almost 16 countries regularly throw industrial wastes a few miles (8) ____ shore. Water is free to everyone. A few years ago, people thought that the supply of clean water in the world was limitless. Today, many water supplies have been (9) ____ by pollution and sewage. Clean water is now scarce, and we are at last beginning to respect this precious (10) _____.We should do something now

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Lead poisoning in children is a major health concern. Both low and high doses of paint can have serious effects. Children exposed to high doses of lead often suffer permanent nerve damage, mental retardation, blindness, and even death. Low doses of lead can lead to mild mental retardation, short attention spans, distractibility, poor academic performance, and behavioral problems.
This is not a new concern. As early as 1904, lead poisoning in children was linked to lead-based paint. Microscopic lead particles from paint are absorbed into the bloodstream when children ingest flakes of chipped paint,plaster,or paint dust from sanding. Lead can also enter the body through household dust, nailbiting, thumb sucking, or chewing on toys and other objects painted with lead-based paint. Although American paint companies today must comply with strict regulations regarding the amount of lead used in their paint, this source of lead poisoning is still the most common and most dangerous. Children living in older, dilapidated houses are particularly at risk.

What does the author imply in the final sentence of the passage?

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Market research has become more and more important in recent years. In some organizations, in fact, managers will not initiate any activity without market research to back them up. The first thing to be said about market research is that it is not an (1)___ to management decision making. No form of market research, no matter how deep, complicated and detailed, can ever be seen as a substitute (2)_____ creative decisionmaking by professional managers. At its very best, all it can do is (3) _____ some doubt and clarify the nature of the problem. It may even be seen as a tool which can improve the (4)_____ of decisions but it is not in itself a decision-making mechanism. Market research, in (5)_____with a number of other approaches in marketing, suffers from the frequent (6)_____ that it is not really accurate. Market research results can never be completely accurate because they (7)____with a dynamic, ever-changing marketplace. It is vital that this is understood by everyone with an imagination when considering market research results and when making any (8)____ to apply them in the marketplace. Lastly, it should always be remembered that market research is not an end in itself but simply a (9) _____ by which some degrees of risk can be removed from marketplace activity. If no activity results from the research, then the entire exercise has been completely (10)_____

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British families started going on holiday to the seaside around the middle of the 19th century. The invention of the railways (45) ____ this possible. The first holidaymakers were quite rich and went for their health and education. The seaside was a place to be (46) ____ of illness, and doctors recommended bathing in the sea and drinking sea water. Also to (47) ____ their knowledge, families attended concerts and read books from the library. At that time, ordinary working people had very little time (48) ____ work. However, in 1871, the government introduced four ‗Banking Holiday‘ - national holiday days. This (49) ____ 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 (50) ____ of special cheap tickets on the railways. By the 1880s, rising incomes (51) ____ that 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 (52) ____ them. Holidaymakers enjoyed being idle, sitting on the beach, bathing in the sea, and eating ice-cream. Cheap entertainment was (53) ____ offer and holidaymakers went to have fun. Today the English seaside (54) ____ popular, with more than 18 million holidays taken there each year.

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How many times in the last hundred years or so have people talked of the imminent death of the book? Films were an early threat because they were so effective at telling stories in a visual way. Next there was radio, (26)...... stepped into the mid-twentieth century and provided such an alternative to books as drama, documentaries and discussions. When television arrived, many people believed that it would finish the book off. Nowadays, (27)............ the threat by TV, the book is thought to be endangered by computers and the Internet, and by other technological attractions (28).........  theCD and the video game, too Surely there are now reasons why (29).............  book ought to be dead, or at least very badly injured. If so, why does it not show proper respect for these reportedly less literate times (30)......... die out? There is clearly more than a single answer to this question. Firstly, we have more leisure time than we(31)..........  to, and people are generally living longer, which means there is more time to do more (including reading books). As (32)............ as this, there is the strength of the book as a tradition. We are all too dismissive of traditions in our modern world, but they can have very strong pull (33)....... us. Added to this, the book is such a practical tool: it doesn't cost too (34).......... , it is usually small enough to carry around, and it can easily be (35)......... . We will never go without books, because they have served us so well for so long

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Our family has got many books. All the …(33)……… of our family buy books and read them. My mother says that books help us in self-education. In ancient times, books ……(34)…… written by hand. It was difficult to write a book …(35)……… a pen. Then printing came into our life. Printing played an important ……(36)…. in the development of literature and culture. Now there are a lot of books in the shops, there are many books in our flats. But it is difficult to buy all books …(37)……… we want to read. That‘s why we get books in public libraries. There are some problems in our life and sometimes it is difficult to ……(38)… them. I think that books can help us. Last year I read a very interesting book ― An American Tragedy‖ by Theodore Dreiser. This novel was …(39)…… at the beginning of the 20th century. The novel ……(40)……. The tragic fate of a boy and a girl, Clyde and Roberta ……(41)…… name. It is a sad story. This novel was written many years ago, but it is …(42)……… nowadays. Books must be our friends during our life

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Every drop of water in the ocean, even in the deepest parts, responds to the forces that create the tides. No other force that affects the sea is so strong. Compared with the tides, the waves created by the wind are surface movements felt no more than a hundred fathoms below the surface. The currents also seldom involve more than the upper several hundred fathoms despite their impressive sweep.
The tides are a response of the waters of the ocean to the pull of the Moon and the more distant Sun. In theory, there is a gravitational attraction between the water and even the outermost star of the universe. In reality, however, the pull of remote stars is so slight as to be obliterated by the control of the Moon and, to a lesser extent, the Sun.
Just as the Moon rises later each day by fifty minutes, on the average, so, in most places, the time of high tide is correspondingly later each day. And as the Moon waxes and wanes in its monthly cycle, so the height of the tide varies. The tidal movements are strongest when the Moon is a sliver in the sky, and when it is full. These are the highest flood tides and the lowest ebb tides of the lunar month and are called the spring tides. At these times the Sun, Moon, and Earth are nearly in line and the pull of the two heavenly bodies is added together to bring the water high on the beaches, to send its surf upward against the sea cliffs, and to draw a high tide into the harbors. Twice each month, at the quarters of the Moon, when the Sun, Moon, and Earth lie at the apexes of a triangular configuration and the pull of the Sun and Moon are opposed, the moderate tidal movements called neap tides occur. Then the difference between high and low water is less than at any other time during the month.

What is the cause of spring tides?

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May 7, 1840 was the birthday of one of the most famous Russian composers of the nineteenth century Peter Illich Tchaikovsky. The son of a mining inspector, Tchaikovsky studied music as a child and later studied composition at the St.Pertersburg Conservatory. His greatest period of productivity occurred between 1876 and 1890, during which time he enjoyed the patronage of Madame von Meck, a woman he never met, who gave him a living stipend of about $1,000.00 a year. Madame von Meck later terminated her friendship with Tchaikovsky, as well as his living allowance, when she, herself, was facing financial difficulties. It was during the time of Madame von Meck’s patronage, however, that Tchaikovsky created the music for which he is most famous, including the music for the ballets of Swan Lake and The Sleeping Beauty.
Tchaikovsky’s music, well known for its rich melodic and sometimes melancholy passages, was one of the first that brought serious dramatic music to dance. Before this, little attention had been given to the music behind the dance. Tchaikovsky died on November 6,1893, ostensibly of cholera, though there are now some scholars who argue that he committed suicide.

With what topic is the passage primary concerned?

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Few people now question the reality of global warming and its effects on the worlds climate. Mary scientists (1) ________ the blame for recent natural disasters on the increase in the worlds temperatures and are convinced that, more than (2) ________ before, the Earth is at risk from the forces of the wind, rain and sun. (3) ________ to them, global warming is making extreme weather events, such as hurricanes and droughts, even more (4) ________ and causing sea levels all around the world to (5) ________ . Environmental groups are putting (6) ________ on govemments to take action to reduce the amount of carbon dioxide which is given (7) ________ by factories and power plants, thus attracking the problem at its source. They are in (8) ________ of more money being spent on research into solar, wind and wave energy devices, which could then replace existing power (9) ________ . Some scientists, (10) ________ , believe that even if we stopped releasing carbon dioxide and other gases into the atmosphere tomorrow, we would have to wait several hundred years to notice the result. Global I warming, it seems, is to stay

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__55)______ history, women have always aimed for a recognized place in (56)________ Guided by their own (57)________of knowledge and expertise, women like Marie Curie in science, Mary Wollstonecraft in literary writing, Simone de Beauvois in philosophical existentialist debate, and Marie Stopes in medicine, to name a few, have brought about (58)________awareness of the role of women in any walks of life. These women have helped redefine and (59)________ the nature of women‘s place in society. Today the (60)________ of global women's organizations and the impact of women's contributions (61)________society show that progress has been made and the progress in furthering the role of women in society has been some benefits to the (62)________ woman. It is true to say that not all women have the same need. The need of the woman who stays at home and (63)________children will differ widely from the woman who works outside. Nonetheless, in the extensive field of equal opportunities, it would be good to know that access is given to both with equal measure according to the true value of respective abilities. It also would be good to know that the woman at home is recognized as a valued (64)________of society just as much as the one who deals with business outside the home

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Carbon dating can be used to estimate the age of any organic natural material; it has been used successfully in archeology to determine the age of ancient artifacts or fossils as well as in a variety of other fields. The principle underlying the use of carbon dating is that carbon is a part of all living things on Earth. Since a radioactive substance such as carbon-14 has a known half-life, the amount of carbon-14 remaining in an object can be used to date that object.
Carbon-14 has a half-life of 5,570 years, which means that after that number of years, half of the carbon- 14 atoms have decayed into nitrogen-14. It is the ratio of carbon-14 in that substance that indicates the age of the substance. If, for example, in a particular sample the amount of carbon- 14 is roughly equivalent to the amount of nitrogen-14, this indicates that around half of the carbon- 14 has decayed into nitrogen-14, and the sample is approximately 5,570 years old.
Carbon dating cannot be used effectively in dating objects that are older than 80,000 years. When objects are that old, much of the carbon-14 has already decayed into nitrogen-14, and the molecule amount that is left doesn’t provide a reliable measurement of age. In the case of older objects, other age-dating methods are available, methods which use radioactive atoms with longer half-lives than carbon has.

The word “underlying” could best be replaced by     .

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The joys and tribulations of being a pet owner! During our lifetime most of us have some experience of either owning a pet or being in (1) ________contact with someone who does. Is there such a things as ―the ideal pet‖? If so what characterizes the ideal pet? Various (2) ________influence one‘s choice of pet, from your reasons for getting a pet to your lifestyle. For example, although quite a few pets are relatively cheap to buy, the cost of (3) ________can be considerable. Everything must be (4) ________into account, from food and bedding, to vaccinations and veterinary bills. You must be prepared to (5) ________ time on your pet, which involves shopping for it, cleaning and feeling it. Pets can be demanding and a big responsibility. Are you prepared to exercise and (6) ________an animal or do you prefer a more independent pet? How much spare room do you have? Is it right to lock an energetic animal into a (7) ________space? Do you live near a busy road which may threaten the life of your pet? Pets (8) ________ as turtles and goldfish can be cheap and convenient, but if you prefer affectionate pets, a friendly cat or dog would be more (9) ________ . People get pets for a number of reasons, for company, security or to teach responsibility to children. Pets can be affectionate and loyal and an excellent source of company as long as you know what pet (10) ________ you and your lifestyle

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The three phases of human memory are the sensory memory, the short-term memory, and the long- term memory. This devision of the memory into phases is based on the length of time of the memory.
Sensory memory is instantaneous memory. It is an image or memory that enters your mind only for a short period of time; it comes and goes in under a second. The memory will not last longer than that unless the information enters the short-term memory.
Information can be held in the short-term memory for about twenty seconds or as long as you are actively using it. If you repeat a fact to yourself, that fact will stay in your short-term memory as long as you keeprepeating it. Once you stop repeating it, either it is forgotten or it moves into long term memory.
Long-term memory is the huge memory tank that can hold ideas and images for years and years. Information can be added to your long-term memory when you actively try to put it there through memorization or when an idea or image enters your mind on its own.

According to the passage, when will information stay in your short-term memory?

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Earth is the only place we know of in the universe that can support human life. (33) ______ human activities are making the planet less fit to live on. As the western world carries on consuming (34)_______ of the world's resources while half of the world's population do so just to stay (35)_______ we are rapidly destroying the only resource we have (36)________ which all people can survive and prosper. Everywhere fertile soil is (37)______ built on or washed into the sea. Renewable resources are exploited so much that they will never be able to recover (38)______. We discharge pollutants into the atmosphere without any thought of the consequences. As a (39)______, the planet's ability to support people is being reduced at the very time when rising human numbers and consumption are making increasingly heavy demands on it. The Earth's (40)______ resources are there for us to use. We need food, water, air, energy, medicines, warmth, shelter and minerals to (41)______ us fed, comfortable, healthy and active. If we are sensible in how we use the resources they will last indefinitely. But if we use them wastefully and excessively they will soon (42)_______ and everyone will suffer