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.
For kids, water sports are adventurous and fun filled, but safety has to be given first (1)....... . All kids should compulsorily wear life jackets, (2) ...........they know how to swim. All boats and rafts should  also carry (3)..........life jackets, whistles and lifebuoys. While playing water sports, kids need to be accompanied by an adult, preferably an attentive lifeguard, who must know how to swim. He should  also  know  what   to   do   during   times   of   emergency   and   the   ABCs   of   giving   first   (4)............. Water sports should always be carried out when the climate is pleasant. If the weather is sunny, do apply sun screen cream to protect the children from radiations.
There  are  different  kinds  of  water  sports  for  children.  Let's  start  with  a  simple  water  sport (5).................. boating, which is very much enjoyable. In most of the kids and youths camps you'll find boating and canoeing. If you want an adventurous water sport, then sailing has to be your first choice.

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

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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 “it” in paragraph 1 refers to     .

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All relationships go through difficult times. In the past, when married couples had problems they usually didn‘t (11) . They had to either (12) with each other or continue to live together in an unhappy relationship. Getting divorced wasn‘t an option for most people due to economic and social reasons. Some people believe that this wasn‘t such a bad thing. They say that relationships require hard work and (13) . ―If a relationship is going to last a lifetime, you have to keep working at it,‖ says Doreen, who is celebrating her fiftieth wedding anniversary this year. ―It isn‘t all roses and romance. (14) perfect all of the time. These days young people give up when there‘s the (15) argument.‖ Experts agree that communication is key. The most important thing is to (16) talking. How many times have you heard yourself say to (17) , ―If only you‘d listen!‖ or ― I wish you (18) do that!‖ The truth is, the (19) couples talk, the better their relationship (20) be

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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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During shopping trip to your supermarket, you will (1)_____ many similar products. How do manufacturers (2)_____ you to buy their products and not those of another company? By careful packaging! (3)_____ of the boxes and bottles that you see has been carefully designed to appeal to you, personally. Do you care about the environment? Then buy this washing powder; it contains (4)_____ chemicals. Do you want to impress your friends? Buy these trainers; they have a designer label. Before manufacturers market a new product, they spend months discussing the packaging. Then, they try out their ideas on a group of customers. Manufacturers (5)_____ customers will see more than just a box or bottle. They want to convince you that their product ((6)_____ your personality more than any other product in the shop. One psychologist did some interesting (7)_____ .He wanted to (8)_____ how important packaging is. He asked customers to try a certain drink. They all agreed about the taste and quality. Then he secretly poured the same drink into a differently designed bottle. The results changed! People thought this drink tasted much better than the first, (9)_____ both drinks were, in fact, the same! To the researcher‘s amazement, people‘s opinions depended (10)_____ the design of the bottle

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Women are expert at gossiping, and they always talk about trivial things, or at least that‘s what men have always thought. However, some new research (1) _____ that when women talk to women, their (2) ______ are far from frivolous, and cover many more (3) _____ (up to 6 subjects) than men talk to other men. Women‘s conversations (4)_____ from health to their houses, from politics to fashion, from movies to family, from education to relationship problems. Sports are notably (5)_____. Men tend to have a more limited range of subjects, the most popular being work, sports, jokes, cars, and women. According to Professor Petra Boynton, a psychologist who interviewed over 1000 women, women also tend to move quickly from one subject to another in (6)_____, while men usually stick to one subject for longer periods of time. At work, this (7) _____ can be an advantage for men, as they can put other matters aside and concentrate matter aside and concentrate (8) ______ on the topic being discussed. On the other hand, it also means that they sometimes find it hard to concentrate when several things have to be discussed at the same (9) _____ in a meeting. Professor Boynton also says that men and women talk for different reasons. In social (10) _____ women use conversation to solve problems and reduce stress while men talk with each other to laugh or to compare opinions

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The reality of an interview is never as bad as your fears. For some reasons, people imagine the interview is going to jump on every tiny mistake they (1) _____. In truth, the interviewer is as keen for the meeting to go well (2) _____ you are. It is what makes his or her job (3) ______. The secret of a good interview is preparing for it.What you wear is always important as it creates the first impression. So (4) _____ neatly, but comfortably. Make (5)______ 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 anurse? What is the most important (6) ______ a good nurse should have? Apart from nursing, what other careers have you (7) ______? What are your interests and hobbies? Answer the questions fully and precise. For instance, if one of your interests is reading, be prepared to talk about the sort of books you like. (8)_____, do not learn all the answers off by heart. The interviewer wants to meet a human (9) ____, not a robot. Remember, the interviewer is genuinely interested in you, so the more you relax and are yourself, the more (10) ____you are to succeed

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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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The Thames Barrier is a major part of the flood defence scheme for protecting London (1) ____________ rising water levels. The defenses (2)___________ include raised river embankments and additional flood gates at strategic points, including the Barking Baưier. The unique structure that is the Barrier spans the 520-metre wide Woolwich reach and consists of 10 separate movable gates, each pivoting and supported between concrete structures which house the operating machinery. When raised, the four main gates (3) _____________ stand as high as a five-storey building and as (4) __________as the opening of Tower Bridge. Each (5) _____________ 3700 tonnes. During the first twelve years of (6) ______________________________________ , the Barrier has been closed twenty nine times to protect London. (7) __________ the Barrier from the comfortable Cafeteria. Picnic on the riverside embankment. Enjoy beautiful views from the riverside walk. Visit the shop which stocks a large selection of souvenirs, books and Barrier information. There is a children‘s play (8) _______ suitable for 4 – to 12-year olds, (9) __________ adjacent to the riverside walk. A visit to the spectacular Thames Barrier is a (10) ___________ experience.

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Researchers in the field of psychology have found that one of the best ways to make an important decision, such as choosing a university to attend or a business ……(1)…….., involves the utilization of a decision worksheet. Psychologists ……(2)…….. optimization compare the actual decisions made by people to theoretical ideal decisions to see how similar they are. Proponents of the worksheet procedure believe that it will yield optimal, that is, the best decisions. ……(3)…….. there are several variations on the exact format that worksheets can take, they are all similar in their essential aspects. Worksheets require defining the problem ……(4)…….. a clear and concise way and then listing all possible solutions to the problem. Next, the pertinent considerations that will be affected by each decision are listed, and the relative importance of each consideration or consequence ……(5)……... Each consideration is assigned a numerical value to reflect its relative importance. A decision is mathematically calculated by adding these values together. The alternative with the highest number of points emerges as the best decision. Since most important problems are multifaceted, there are several alternatives to choose from, each with unique advantages and disadvantages. One of the benefits of a pencil and paper ……(6)…….. procedure is that it permits people to deal with more variables than their minds can generally comprehend and remember. …… (7)…….., people can keep about seven ideas in their minds at once. A worksheet can be especially useful when the decision involves a large ……(8)…….. of variables with complex relationships. A realistic example for many college students is the question "What will I do after graduation?" A graduate might seek a position that offers specialized training, pursue an advanced degree, or ……(9)…….. for a year. A decision-making worksheet begins with a succinct statement of the problem that will also help to narrow it. It is important to be clear about the distinction between long-range and immediate goals because long-range goals often involve a different decision than short-range ones. Focusing on long-range goals, a graduating student might revise the question above to "What will I do after graduation that will ……(10)…….. a successful career?"

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Carbohydrates, which are sugars, are an essential part of a healthy diet. They provide the main source of energy for the body, and they also function to flavor and sweeten foods. Carbohydrates range from simple sugars like glucose to complex sugars such as amylose ans amylopectin. Nutritionists estimate that carbohydrates should make up about one-fourth to one-fifth of a person’s diet. This translates to about 75-100 grams of carbohydrates per day.
A diet that is deficient in carbohydrates can have an adverse effect on a person’s health. When the  body lacks a sufficient amount of carbohydrates, it must then use  its protein supplies for energy, a process called gluconeogenesis. This, however, results in a lack of necessary protein, and further health difficulties may occur. A lack of carbohydrates can also lead to ketosis, a build-up of ketones in the body that causes fatigue, lethargy, and bad breath.

Which of the following do carbohydrates NOT do?

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Nearly 200 of the 1500 native plant species in Hawaii are at risk of going extinct in the near future because they have been (33)_______ to such low numbers. Approximately 90 percent of Hawaii's plants are found nowhere else in the world but they are (34)_______ by alien invasive species such as feral goats, pigs, rodents and (35)_______ plants. The Hawaii Rare Plant Restoration Group is striving to (36)_______ the extinction of the 182 rare Hawaiian plants with fewer than 50 individuals remaining in the (37)_______ . Since 1990, (38)_______ a result of their "Plant Extinction Prevention Program", sixteen species have been brought into (39)_______ and three species have been reintroduced. Invasive weeds have been removed in key areas and fencing put up in order to (40)_______ plants in the wild. In the future the Hawaii Rare Plant Restoration Program aims (41)_______ collecting genetic material from the remaining plants in the wild for storage as a  safety net for the future. They also aim to manage wild populations and where possible reintroduce species into (42)_______

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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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The invention of the airplane , like many great inventions, was initially met with ridicule and disbelief. Although many people who heard about the first powered flight on December 17, 1903, were excited and impressed, others reacted with peals of laughter. The idea of flying an aircraft was repulsive to some people. Although Orville and Wilbur Wright, the inventors of the first flying machine, were called impulsive fools, the Wrights continued their experiments in aviation. Orville and Wilbur Wright had always had a compelling interest in aeronautics and mechanics. As young boys they earned money by making and selling kites and mechanical toys. Later, they designed a newspaper-folding machine, built a printing press, and operated a bicycle-repair shop. In 1896, when they read about the death of Otto Lilienthal, the brother's interest in flight grew into a compulsion. Lilienthal, a pioneer in hang-gliding, had controlled his gliders by shifting his body in the desired direction. This idea was repellent to the Wright brothers, however, and they searched for more efficient methods to control the balance of airborne vehicles. In 1900 and 1901, the Wrights tested numerous gliders and developed control techniques. The brothers' inability to obtain enough lift power for the gliders almost led them to abandon their efforts. After studying and experimenting with model wings in a wind tunnel, the Wright brothers designed their first airplane in 1903 for less than one thousand dollars. They even designed and built their own lightweight gasoline engine. On December 17, they successfully flew the plane for twelve seconds and 120 feet, despite a turbulent start. By 1905 the Wrights had perfected the first airplane that could turn, circle, and remain airborne for half an hour at a time. Others had flown in balloons or in hang gliders, but the Wright brothers were the first to build a full-size machine that could fly under its own power. As the contributors of one of the most outstanding engineering achievements in history, the Wright brothers are accurately called the fathers of aviation.
The word them in paragraph 3 refer to ______

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The first traffic signal was invented by a railway signaling engineer. It was installed (33) ___ the Houses of Parliament in 1868. It (34)_____ like any railway signal of the time, and was operated by gas. (35) ____, it exploded and killed a policeman, and the accident discouraged further development until cars became common. (36) ____ traffic lights are an American invention. Red – green systems were installed in Cleveland in 1914. Three - color signals, operated (37) _____ hanz d from a tower in the (38) _____ of the street, were installed in New York in 1918. The first lights of this type to (39) ____ in Britain were in London, on the junction between St. James‘s Street and Piccadilly, in 1925. Automatic signals were installed (40) ____ year later. In the past, traffic lights were special. In New York, some lights had a statue on top. In Los Angeles the lights did not just change silently, but would ring bells to (41) _____ the sleeping motorists of the 1930s. These are gone and have been (42) ____ by standard models which are universally adopted

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A recent issue of a language learning magazine has consulted a number of experts in the (1)________ of second language acquisition. Their advice may prove invaluable for those (2)______ a language course. One suggestion is that you (3)______whether you are likely to be successful at learning a language or not. Did you enjoy studying languages at school, for example? Do you have enough time to learn a language? The main (4)______will be your own time and effort. Therefore you must make sure that the course on offer leads to a (5)______ qualification. Also, be realistic in your (6)______. If you don't set achievable aims you are more likely to give up. Do not be deceived (7)______thinking that the most expensive courses are the best. (8)______around to get the best possible value for money. You should also bear in mind that the quicker you learn a language the more quickly you forget it. Sandra Miller, a French teacher, tried to teach herself German by enrolling on a (9)______ course. Already fluent in four languages and with a sound knowledge of teaching methodology her chances of (10)______progress were high. Three years on she remembers very little. She feels her biggest mistake was not to build on her previous studies. "I should have consolidated what I'd learnt by continuing to study, even if it were by myself."

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Think for a moment about the last music album you bought. Most likely, you’ll think of the singer or band that made you want to buy the album. You might even know the name of the guitar player or the drummer. Those talented performers, however, are only some of the people in the music industry work behind the scenes, but the roles they play in the musical progress are very important. Songwriters: Songs begin with the songwriter. Some songwriters work alone, but many work in teams that combine the talents of a lyricist, who writes the words to songs, and an instrumentalist, often a piano player or guitarist, who writes the music. Many of today’s pop stars work with songwriters. For example, some of Lady Gaga’s biggest hits were written by Nadir Khayat, also known “RedOne”. Some songwriting teams have become very famous, such as Mike Stock, Matt Aitken, and Pete Waterman, who were responsible for many big 1980s pop hits.
Arrangers: After a song has been written, music arrangers make it more appealing by deciding which instruments will be used, what tempo, or speed, the song will have, and whether the song should have a lower or higher pitch. A good arrangement can bring a song to life and make it a classic.
Studio Musicians: Not every singer or instrumentalist can be a star, and many work in the background as studio musicians. These artists are not a part of any one musical group. Instead, they are hired for recording sessions that eventually become the albums you buy, as well as soundtracks for television shows, movies, and radio ads.
Recording Engineers: Recording engineers also play a major role in creating the final sound that you hear. First, these engineers set up the recording studio, the room where the performers play, placing musicians and microphones in exactly the right places to get the best sound. Next, they use electronic equipment, such multi-track recorders, to capture the music. Finally, long after the musicians have gone home, recording engineers use a mixing board to balance the melodies and rhythms of each musician, and sometimes to incorporate special sound effects or additional tracks. Many people make a living with music. You may not recognize all of their names, but all of them work together to create the songs you love to listen to.

The article is mainly about     .

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It’s a sound you will probably never hear, a sickened tree sending out a distress signal. But a group of scientists has heard the cries, and they think some insects also hear the trees and are drawn to them like vulture to a dying animal. Researchers with the US Department of Agriculture’s Forest Service fastened sensors to the bark of drought-stricken trees clearly heard distress calls. According to one of the scientists, most parched trees transmit their plight in the 50-hertz to 50-kilohertz range. (The unaided human ear can detect no more than 20 kilohertz). Red oak, maple, white pine, and birch all make slightly different sounds in the form of vibrations at the surface of the wood.
The scientists think that the vibrations are created when the water columns inside tubes that run along the length of the tree break, a result of too little water following through them. These fractured columns send out distinctive vibration pattems. Because some insects communicate at ultrasonic frequencies, they may pick up the trees' vibration and attack the weakened trees. Researchers are now running tests with potted trees that have been deprived of water to see if the sound is what attracts the insects. “Water-stressed trees also smell differently from other trees, and they experience thermal changes, so insects could be responding to something other than sound”, one scientist said.

It can be inferred from the passage that the sounds produced by the trees      

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Nearly 200 of the 1500 native plant species in Hawaii are at risk of going extinct in the near future because they have been (33)_______ to such low numbers. Approximately 90 percent of Hawaii's plants are found nowhere else in the world but they are (34)_______ by alien invasive species such as feral goats, pigs, rodents and (35)_______ plants. The Hawaii Rare Plant Restoration Group is striving to (36)_______ the extinction of the 182 rare Hawaiian plants with fewer than 50 individuals remaining in the (37)_______ . Since 1990, (38)_______ a result of their "Plant Extinction Prevention Program", sixteen species have been brought into (39)_______ and three species have been reintroduced. Invasive weeds have been removed in key areas and fencing put up in order to (40)_______ plants in the wild. In the future the Hawaii Rare Plant Restoration Program aims (41)_______ collecting genetic material from the remaining plants in the wild for storage as a  safety net for the future. They also aim to manage wild populations and where possible reintroduce species into (42)_______

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It takes a long time to raise a family of owlets, so the great horned owl begins early in the year. In January and February, or as late as March in the North, the male calls to the female with a resonant hoot. The female is larger than the male. She sometimes reaches a body length of twenty-two to twenty-four inches, with a wingspread up to fifty inches. To impress her, the male does a strange courtship dance. He bobs. He bows. He ruffles his feathers and hops around with an important air. He flutters from limb to limb and makes flying sorties into the air. Sometimes he returns with an offering of food. They share the repast, after which she joins the dance, hopping and bobbing about as though keeping time to the beat of an inner drum. Owls are poor home builders. They prefer to nest in a large hollow in a tree or even to occupy the deserted nest of a hawk or crow. These structures are large and rough, built of sticks and bark and lined with leaves and feathers. Sometimes owls nest on a rocky ledge, or even on the bare ground. even to occupy the deserted nest of a hawk or crow. These structures are large and rough, built of sticks and bark and lined with leaves and feathers. Sometimes owls nest on a rocky ledge, or even on the bare ground. The mother lays two or three round, dull white eggs. Then she stoically settles herself on the nest and spreads her feather skirts about her to protect her precious charges from snow and cold. It is five weeks before the first downy white owlet pecks its way out of the shell. As the young birds feather out, they look like wise old men with their wide eyes and quizzical expressions. They clamor for food and keep the parents busy supplying mice, squirrels, rabbits, crayfish, and beetles. Later in the season baby crows are taken. Migrating songsters, waterfowl, and game birds all fall prey to the hungry family. It is nearly ten weeks before fledglings leave the nest to search for their own food. The parent birds weary of family life by November and drive the young owls away to establish hunting ranges of their own.

According to the passage, great horned owls