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In 2014, the study conducted by Shi Ping Liu and colleagues helps to shed light on this mystery

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Fashion is no longer something that is just made of cloth or leather. These days it has become something that needs batteries and is often connected to the Internet. When it comes to high-tech fashion, it might be (31) _________ to your wrist or resting on the bridge of your nose, and it is doing a lot more than just (32) _________ you look stylish. Google was one of the first to burst on the scene with a fashionable item that was also very (33) _________. Google Glass, which looks like glasses, allows wearers to do all sorts of things, from seeing information in a simple viewer to simply saying out loud, “Take a picture.” What you are seeing in the picture that will be taken, (34) _________Google Glass heard you through its microphone and has a built-in camera. If you ask a question, you will (35) _________ the answer in the tiny screen displayed before one eye. Google Glass uses Bluetooth technology to communicate with a smartphone, so it is not a stand-alone item.

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One of the greatest concerns parents have when facing an international move is “What schooling will be available to my child? Will my child be disadvantaged academically as a result of this move?”. (12) _____ this fear is certainly strongest in families moving overseas for the first time, even those who may be more experienced often have concerns about their children’s education. Dr. Ernest Mannino, Director of the State Department’s Office of Overseas Schools, and Dr.Keith Miller, Deputy Director of the office, spoke candidly (13) _____ some of the common concerns parents have regarding the education of their children. Dr. Mannino and Dr. Miller (14) _____ parents against making assumptions about their children’s education. To make an educated choice, parents need to (15) _____ through schooling issues and to research post schools as far in advance of a move as possible. Children (16) _____ are internationally mobile have many choices of schools to attend. In most major cities, there are schools based on the U.S, French, German, and British systems. Some parents also choose to become their children’s teachers through home education. Which school is appropriate for your child is an individual decision based on many factors

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British people have a reputation for being rather quiet and reserved. However, a new study has (1) ____ that Britons are actually quite sociable and the (2) ____ person claims to have 14 close friends. Although a minority of those questioned (3) ____ that they had no best friend, a quarter said that they had more than 18 close friends. Experts said that this is (4) ____ to changes in the way people (5) ____ their free time. They are now more (6) ____ to invite friends to their homes or go out socialising than previous generations. The increasing use of mobile phones and emails has also made it easier to (7) ____ a greater number of friendships.  Men's relationships are not (8) ____ though they tend to have more friends. Women, (9) ____ prefer to have a small number of friends they can trust (10) ____, and with whom they can feel completely at (11) ____. The idea that people in the north of England are more neighbourly than those in the south seems to be backed (12) ____ by the survey. However, despite having friends, it seems that family still (13) ____ an important part in most people's lives. When asked who they would (14) ____ to for help if they were ill or had a problem, the majority said that they would (15) ____ upon a relative first rather than a friend

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The American southwest is full of deserts. If you ever go there, you might get to see a very strange event. We are talking something called the sailing stones. Sometimes, stones in the southwestern desert move by themselves. Wind doesn’t seem to push them. People and animals don’t touch them. However, these stones still move. Sometimes they travel more than a hundred meters. They always leave a trail in the sand behind them. This is useful because we can look at the trail and figure out how far a stone has moved. How is this possible? How can stones move all by themselves? Scientists have been studying this for years. People have offered all kinds of theories. One of the earliest theories was that wind pushes the stones. That theory isn’t correct, because some of the stones weigh more than 300 kilograms. When it seemed like there was no logical explanation for the sailing stones, people started coming up with crazier ideas. Some people said that aliens were moving the stones, and others said that clever people were playing a joke. Finally, in 2013, a scientist came up with an explanation for the sailing stones. This scientist normally studies weather on other planets, and when he heard about the sailing stones, he became interested in them. He found out that ice forms on the bottom of the stones. When that happens, even a very light wind can push the stone for long distances. To prove his theory, the scientist did an experiment. He put a rock in his freezer and let some ice form on it. Then, he put sand and a little water in a tray. Finally, he put his frozen rock on top of the sand. When he blew on the rock, it moved. Even when he blew very gently, he had no problems moving the rock. Here is something interesting about the sailing stones. Curious people visit the desert in the southwest to see them. A lot of those people don’t like to hear the scientific explanation for the sailing stones. Many people prefer to feel that the stones are still a mystery.
2. What kind of work did the scientist do before he studied the sailing stones?

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VA tiny village school is soon to celebrate its 110 birthday - against all expectations. Five years ago it seemed certain to close but parents and other villagers fought the local education authority and raised funds to keep it (1)_________. It is now ending its first term as a school (2)_________by the village community and the villagers are just proud of their achievement. They were furious when education chiefs tried to make them send the village children to other schools further away because the number of pupils at the village school was too (3)_________. The villagers started a huge campaign to (4)_________money. They collected enough to hire a teacher and begin to help with school cleaning, lunch supervision and lessons. Now the school is doing well and it seems (5)________it will continue to run in the future

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In such a costly and (25) _____ society and world, no one of us can live without money. We need money to fulfil our basic needs of the life such as buying food, and other many basic necessities of life which are almost impossible to buy without money. People in the society (26) _____ are rich and have property are looked as honourable and respectful person of the society however a poor person is seen as hatred without any good impression. Money increases the position of the person in the society and (27) _____ a good impression to him. All of us want to be rich by earning more money through good job or business in order to fulfil all the increasing demands of the modern age. (28) _____, only few people get this chance of completing their dreams of being a millionaire. So, money is the thing of great importance all through the life. Money is required by everyone whether he/she is rich or poor and living in urban areas or rural areas. People in the urban areas are earning more money than the people living in backward or rural areas as the people of the urban areas have more (29) _____ to the technologies and get more opportunity because of the easy sources

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Have you ever had the feeling that people older than you are hard to understand? Or, have you felt like people from younger generations just don't get it? Maybe you find (23) ____ easier to connect with people who are closer to your age than those who are older or younger than you. You can probably thank the generation gap (24) ____ these feelings.  There are currently six generations (25) ____ in the United States: the Greatest Generation, Silent Generation, Baby Boomers, Generation X, Millennials, and Generation Z. Each generation has its own unique set of characteristics and norms. For example, the Greatest Generation (born 1901-1924) is known for its patriotism, hard workers, and loyalty to institutions. The Millennials (born 1980-2000) are (26) ____ by their dependence on technology, detachment from traditional institutions, optimism, and open-mindedness. It is no wonder that many people from different generations have a hard time understanding each other.  Generation gap refers to differences in actions, (27) ____, interests, and opinions that exist between individuals from different generations. So, what causes these differences?

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When people are looking for a great way to (31) _________ themselves of boredom, videos found on the Internet are often the perfect solution. Such websites as YouTube, Dailymotion, and Vimeo have become so popular that they are known to get millions of visits each day. YouTube is known for allowing people to create their own videos and share them with the world. It is (32) _________ YouTube that enormous amounts of interest in certain videos can be created. So many people watch them that the interest (33) _________ from person to person is almost exponential. Another site that is similar to YouTube is called Vimeo. Although it (34) _________ as a direct competitor to YouTube, Vimeo has more of a concentration on longer videos. However, the (35) _________ is the same in which the service allows users to share their videos with a very wide audience on the Internet

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Families in the 21st century come in all shapes and sizes: traditional, single parent, blended (more than one family together in the same house), and gay and lesbian parents - just to name a few. No matter the "type" of family you have, there are going to be highs and lows - good times and bad.  Many times, however, families become blocked in their relationships by hurt, anger, mistrust, and confusion. These emotions are natural and normal, and few families do not have at least a few experiences with them. The worst time for most families, is during a divorce.  By making a few simple changes in the way we look at the world and deal with other people, it is possible to create happier, more stable relationships. Families need to be units of mutual caring and support; they can be sources of lifelong strength for all individuals.  It is never too late to begin the process of improving family relationships – even if they are already of good quality - by developing some simple skills.  Whereas in other situations you can step back and assess the relationship, it is often hard to do this with your family. Your family may be a constant presence in your life, so when an argument or issue arises, it may seem impossible to handle.  Remember that communication is key to resolving conflict. While it may seem that your siblings are constantly present to annoy you or boss you around, they are also there to communicate.  Use your family's presence to your advantage – communicate with each other, develop ways to value boundaries, and build trust and respect.  
4. The word "units" in the passage almost means

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In Africa a famous food company tried to sell its baby food by advertising it with the picture of a baby on the label. They did not know that this particular country used labels only to (31) _________ a picture of the food inside. When Pepsico used the slogan ‘Come alive with Pepsi’ in Taiwan, they had no idea that it would be translated into Chinese as ‘Pepsi (32) _________ your ancestors back from the dead’. Misunderstandings such as these about language or about culture are sometimes comical but can also cause genuine hurt or anger. Business styles (33) _________ widely in different countries and what is normal in one culture can be completely unacceptable in another. Socialising in different countries can be tricky. In Arabic countries, for example, people do not discuss business (34) _________ meals. Giving gifts is another potential problem: in the UK most people take presents to a dinner party, but in many countries this is not polite because it (35) _________ you think the host is poor.

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Why do people like to chew gum? Some people say they like the taste.(31)________say they can think better if they chew gum. Some people chew it when they have some boring work to do. Others chew gum when they are nervous. Gum is a mixture of things. For many years gum companies made gum from chicle. Chicle is a natural gum from a tree in Mexico and Central America. Now companies use plastic and rubber made from petroleum (32)________of chicle. Gum must be soft so that you can chew it. A softener keeps it soft. The gum company makes the softener from vegetable oil. A sweetener makes the gum sweet. The sweetener is usually sugar. Then the company (33)________the flavor. Thomas Adams made the first gum from chicle in 1836. However , chewing gum was not new. The Greeks chewed gum from a tree (34)________2,000 years ago. Mayan Indians in Mexico chewed chicle. Indians in the Northeastern United States taught Europeans to chew gum from a tree there. People first made bubble gum in 1928. Children like to (35)________bubble with bubble gum. Some university students do too

I am......(1)..... teacher, I……..(2)…….at a primary school in the USA. In the morning I......(3)..... up at seven o'clock. I have breakfast with bread and a cup of coffee. Then I go to work. I teach his students French. I have lunch at school. I go home.....(4)...... one o'clock in the afternoon. I don’t work on Saturdays and Sundays. I go to the cinema, or …….(5)……… a book. I like the books very much. I have a sister in Oxford and a brother in London.

(4)............................

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Nowadays people are more aware that wildlife all over the world is in (25) _____. Many species of animals are threatened, and could easily become (26) _____ if we do not make an effort to protect them. There are many reasons for this. In some cases animals are hunted for their fur or for other valuable parts of their bodies. Some birds, such as parrots, are caught (27) _____, and sold as pets. For many animals and birds, the problem is that their habitats-the place where they live-is disappearing. More land is used for farm, for houses and industry, and there are fewer open spaces than there once were. Farmers use powerful chemicals to help them grow better crops, (28) _____these chemicals pollute the environment and harm wildlife. The most successful animals on Earth, human beings, will soon be the only ones (29) _____ unless we can solve this problem

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Why do people like to chew gum? Some people say they like the taste.(31)________say they can think better if they chew gum. Some people chew it when they have some boring work to do. Others chew gum when they are nervous. Gum is a mixture of things. For many years gum companies made gum from chicle. Chicle is a natural gum from a tree in Mexico and Central America. Now companies use plastic and rubber made from petroleum (32)________of chicle. Gum must be soft so that you can chew it. A softener keeps it soft. The gum company makes the softener from vegetable oil. A sweetener makes the gum sweet. The sweetener is usually sugar. Then the company (33)________the flavor. Thomas Adams made the first gum from chicle in 1836. However , chewing gum was not new. The Greeks chewed gum from a tree (34)________2,000 years ago. Mayan Indians in Mexico chewed chicle. Indians in the Northeastern United States taught Europeans to chew gum from a tree there. People first made bubble gum in 1928. Children like to (35)________bubble with bubble gum. Some university students do too

Read the reading below carefully, and then complete it with the best option A, B, C or D given below:
Approximately 350 million people speak English as their first ___(1)___ . About the same number use it __(2)___ a second language. It is the language ___(3)___ aviation, international sport and world trade. 75% of the world's mail is in English, 60% of the world's radio stations broadcast in English, and more than half of the world's newspapers are ___(4)___ in English. It is an official language in 44 countries. In ___(5)___ others, it is the language of business, commerce and technology. There are many varieties of English, but Scottish, Australian, Indian and Jamaican speakers of English, in spite of the differences in pronunciation, structure and vocabulary, would recognize that they are all speaking the same basic language

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Increasing numbers of parents in the U.S. are choosing to teach their children at home. In fact, the U.S. Department of Education has estimated that in 1999, about 850,000 children were being homeschooled. Some educational experts say that the real number is double this estimate, and the ranks of home-schooled children seem to be growing at the average rate of about eleven percent every year. At one time, there was a theory accounting for home-schooling: it was traditionally used for students who could not attend school because of behavioral or learning difficulties. Today, however, more parents are taking on the responsibility of educating their own children at home due to their dissatisfaction with the educational system. Many parents are unhappy about class size, as well as problems inside the classroom. Teacher shortages and lack of funding mean that, in many schools, one teacher is responsible for thirty or forty students. The children are, therefore, deprived of the attention they need. Escalating classroom violence has also motivated some parents to remove their children from school. Although there have been a lot of arguments for and against it, home-schooling in the U.S. has become a multi-million dollar industry, and it is growing bigger and bigger. There are now plenty of websites, support groups, and conventions that help parents protect their rights and enable them to learn more about educating their children. Though once it was the only choice for troubled children, homeschooling today is an accepted alternative to an educational system that many believe is failing. 
5. Many parents stop their children from going to school because it is now too _______ for them.

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Forget global terrorism - for most of the world's population, ticking time bombs like earthquakes, supervolcanoes and hurricanes pose a far greater threat. Natural disaster expert Bill McGuire reveals a few of the top catastrophes waiting to happen. With NASA's eminent climate scientist, Jim Hansen, concerned that collapsing polar ice sheets could result in sea levels rising 1-2m this century and several more in the next, prospects for the Earth's coastal zones are bleak. A 1m rise would threaten one third of the world's agricultural land, while a 4m rise would maroon Miami 60km offshore. Rising sea levels is not the only threat to coastal regions. The Cumbre Vieja volcano on the Canary Island of La Palma is slowly creeping seawards. During a future eruption, this gigantic landslide will plunge into the ocean, pushing up a bulge of water close to a kilometre high, spawning a mega-tsunami capable of devastating all the coastal areas surrounding the North Atlantic. Coastal regions also face the menace of desertification. By 2030, over half a billion people living around the shores of the Mediterranean will be viewing the encroaching desert with increasing panic. An area bigger than the UK, and home to 16 million people, is threatened - by the end of the century- with transformation from a green and pleasant land to a baking wilderness of sand and rock. However, these disasters seem pale in comparison to the mega-catastrophes waiting to happen like supervolcanoes, for instance. Every 50 millennia or so, a colossal volcanic blast expels sufficient ash and gas to cover a continent and block the Sun's rays for years on end, heralding a bitter volcanic winter. At Yellowstone in Wyoming, US, two such super-eruptions have shattered the crust in the last 2.1 million years and the volcano there remains restless. An asteroid attack is another threat which would have devastating consequences. A total of 713 asteroids with diameters of 1km or more, and the potential to clobber the Earth at some future date, have been identified. A 2km asteroid would load the atmosphere with dust and trigger a sustained global freeze. Harvests would fail and billions would die. Fortunately, such collisions only happen every couple of million years.
2. According to Jim Hansen, what is an outcome of polar ice caps melting?

Choose the best answer A, B, C or D to answer the following question

Binh is a student. He’s 12 years old. He studies at Tran Hung Dao primary school. He usually leave home for school at 6.30 a.m. He lives quite near the school, so he usually walks to school with some of his friends. But today his father is driving him to school. He loves Literature and English. Today he has Physics, Chemistry and English. At school, he often plays volleyball with his best friends.

Why does he walk go to school on foot?

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Scientists have identified two ways in which species disappear. The first is through ordinary or “background” extinctions, where species that fail to adapt are slowly replaced by more adaptable life forms. The second is when large numbers of species go to the wall in relatively short periods of biological time. There have been five such extinctions, each provoked by cataclysmic evolutionary events caused by some geological eruption, climate shift, or space junk slamming into the Earth. Scientists now believe that another mass extinction of species is currently under way – and this time human fingerprints are on the trigger. How are we are doing it? Simply by demanding more and more space for ourselves. In our assault on the ecosystems around us we have used a number of tools, from spear and gun to bulldozer and chainsaw. Certain especially rich ecosystems have proved the most vulnerable. In Hawaii more than half of the native birds are now gone – some 50 species. Such carnage has taken place all across the island communities of the Pacific and Indian oceans. While many species were hunted to extinction, others simply succumbed to the „introduced predators’ that humans brought with them: the cat, the dog, the pig, and the rat. Today the tempo of extinction is picking up speed. Hunting is no longer the major culprit, although rare birds and animals continue to be butchered for their skin, feathers, tusks, and internal organs, or taken as savage pets. Today the main threat comes from the destruction of the habitat of wild plants, animals, and insects need to survive. The draining and damming of wetland and river courses threatens the aquatic  food chain and our own seafood industry. Overfishing and the destruction of fragile coral reefs destroy ocean biodiversity. Deforestation is taking a staggering toll, particularly in the tropics where the most global biodiversity is at risk. The shinking rainforest cover of the Congo and Amazon river basins and such place as Borneo and Madagascar have a wealth of species per hectare existing nowhere else. As  those precious hectares are drowned or turned into arid pasture and cropland, such species disappear forever.
2. The word assault in paragraph 2 is closest in meaning to _____

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People of every culture tell each other fairy tales but the same story often takes a variety of forms in different parts of the world. In the story of Little Red Riding Hood that European children are familiar with, a young girl on the way to see her grandmother meets a wolf and tells him where she is going. The wolf runs on ahead and disposes of the grandmother, then gets into bed dressed in the grandmother’s clothes to wait for Little Red Riding Hood. You may think you know the story – but which version? The universal appeal of these tales is frequently attributed to the idea that they contain cautionary messages: in the case of Little Red Riding Hood, to listen to your mother, and avoid talking to strangers. ‘It might be what we find interesting about this story is that it’s got this survival-relevant information in it,’ says anthropologist Jamie Tehrani at Durham University in the UK. But his research suggests otherwise. ‘We have this huge gap in our knowledge about the history and prehistory of storytelling, despite the fact that we know this genre is an incredibly ancient one,’ he says. That hasn’t stopped anthropologists, folklorists and other academics devising theories to explain the importance of fairy tales in human society. Tehrani’s analysis focused on Little Red Riding Hood in its many forms, which include another Western fairy tale known as The Wolf and the Kids. Checking for variants of these two tales and similar stories from Africa, East Asia, and other regions, he ended up with 58 stories recorded from oral traditions. First, he tested some assumptions about which aspects of the story alter least as it evolves, indicating their importance. Folklorists believe that what happens in a story is more central to the story than the characters in it. However, Tehrani found no significant difference in the rate of evolution of incidents compared with that of characters. Neither did his analysis support the theory that the central section of a story is the most conserved part. But the really big surprise came when he looked at the cautionary elements of the story. ‘Studies on hunter-gatherer folk tales suggest that these narratives include really important information about the environment and the possible dangers that may be faced there – stuff that’s relevant to survival. Yet in his analysis such elements were just as flexible as seemingly trivial details. What, then, is important enough to be reproduced from generation to generation? The answer, it would appear, is fear – blood-thirsty and gruesome aspects of the story, such as the eating of the grandmother by the wolf, turned out to be the best preserved of all. Why are these details retained by generations of storytellers, when other features are not? Tehrani has an idea: ‘In an oral context, a story won’t survive because of one great teller. It also needs to be interesting when it’s told by someone who’s not necessarily a great storyteller.’ Maybe being swallowed whole by a wolf, then cut out of its stomach alive is so gripping that it helps the story remain popular, no matter how badly it’s told. Mathias Clasen at Aarhus University in Denmark isn’t surprised by Tehrani’s findings. ‘Habits and morals change, but the things that scare us, and the fact that we seek out entertainment that’s designed to scare us – those are constant,’ he says. Clasen believes that scary stories teach us what it feels like to be afraid without having to experience real danger, and so build up resistance to negative emotions
2. The word “they” in paragraph 2 refers to ______