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Geothermal energy offers enormous potential for direct, low-temperature applications. Unlike indirect applications, this new technology relies on the Earth's natural thermal energy to heat or cool a house or multifamily dwelling directly without the need to convert steam or other high-temperature fluids into electricity, using expensive equipment. A geothermal system consists of a heat pump and exchanger plus a series of pipes, called a loop, installed below the surface of the ground or submerged in a pond or lake. Fluid circulating in the loop is warmed and carries heat to the home. The heat pump and exchanger use an electrically powered vapor-compression cycle - the same principle employed in a refrigerator - to concentrate the energy and to transfer it. The concentrated geothermal energy is released inside the home at a higher temperature, and fans then distribute the heat to various rooms through a system of air ducts. In summer, the process is reversed: excess heat is drawn from the home, expelled to the loop, and absorbed by the Earth. Geothermal systems are more effective than conventional heat pumps that use the outdoor air as their heat source (on cold days) or heat sink (on warm days) because geothermal systems draw heat from a source whose temperature is more constant than that of air. The temperature of the ground or groundwater a few feet beneath the Earth's surface remains relatively stable – between 45°F and 70°F. In winter, it is much easier to capture heat from the soil at a moderate 50°F than from the atmosphere when the air temperature is below zero. Conversely. in summer, the relatively cool ground absorbs a home's waste heat more readily than the warm outdoor air. The use of geothermal energy through heat-pump technology has almost no adverse environmental consequences and offers several advantages over conventional energy sources. Direct geothermal applications are usually no more disruptive of the surrounding environment than a normal water well. Additionally, while such systems require electricity to concentrate and distribute the energy collected, they actually reduce total energy consumption by one-fourth to two-thirds, depending on the technology used. For each 1,000 hones with geothermal heat pumps, an electric utility can avoid the installation of 2 to 5 megawatts of generating capacity. Unfortunately, only a modest part of the potential of this use for geothermal energy has been developed because the service industry is small and the price of competing energy sources is low.
5. The word "adverse” in paragraph 4 is closest in meaning to ______

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Cities are known to have lives of their own, and photographers are able to (34) _______ . some of it. Whether taking shots of people walking on a crowded street or time-lapse shots of cars driving at night, the (35) _______ . photos can be breathtaking. Because many of the shots taken are of man-made objects like architecture, many emotions that come into (36) _______ wouldn’t be found in nature photography. Photos can show the wonder of a child staring at a fountain as water shoots upward in the sunlight. They can also show the sadder side, such as a camp of homeless people living in terrible poverty. (37) _______ of what they show, there is always beauty to be found, even if it is beauty in something that is showing an ugly truth. Depending on the time of the day, photos taken in an urban environment can change drastically. To see the (38) _______ of a building as its shadow is cast on the lawn of a park is always amazing to see

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Sociologists have been carrying out research into the social pressures of being a teenager. Many adolescents are unhappy at school because they find it difficult to (17) _____ friends. This stress can bring on illness or result in poor grades. They may also worry about their appearance and often feel (18) _____ enormous pressure to dress, talk and behave the same as (19) _____. This phenomenon is called peer pressure, and it is very common in today’s society. Advertising contributes a lot to the social pressures teenagers feel. Advertisers know how important it is to feel that you belong to a group when you are in your teens, so they try to persuade teenagers that certain products will make them (20) _____ with their classmates. Sadly, many teenagers act irresponsibly and even do dangerous things just to make others accept them. Peer pressure is often the reason for teenage smoking, drug (21) _____ or dangerous driving. Teenagers need to learn to say no to social pressure and to find friends who they can talk things over with when they have a problem

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Library is a collection of books and other informational materials made available to people for reading, study, or reference. The word library comes (1)_________ liber, the Latin word for ― book‖ . (2) _____ , library collections have almost always contained a variety of materials. Contemporary libraries maintain collections that include not only printed materials such as manuscripts, books , newspapers, and magazines, (3)_______ audio-visual and online databases. In addition (4) _____ maintaining collections within library buildings, modern libraries often feature telecommunications links that provide users with access to information at remote sites. The central mission of a library (5) _______ to collect , organize, preserve, and provide access to knowledge and information. In fulfilling this mission, libraries preserve a valuable record of culture that can be passed down to (6)_______ generations. Libraries are an essential link in this communication between the past , present, and future. Whether the cultural record is contained in books or in electronic formats, libraries ensure (7) ____ the record is preserved and made available for later use. People use library resources to gain information about personal (8)__ or to obtain recreational materials such as films and novels. Students use libraries to supplement and enhance their classroom experiences, to learn (9)_____ in locating sources of information, and to develop good reading and study habits. Public officials use libraries to research legislation and public policy issues. One of the most valued of all cultural institutions, the library (10) ___ information and services that are essential to learning and progress. From ― Library ( institution)‖ by Richard S.Halsey et al

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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.
4. The word ‘menace’ in paragraph 3 mostly means _______

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How do children learn about wildlife? And is what they learn the sort of thing they should be learning? It is my belief that children should not just be acquiring knowledge of animals but also developing attitudes and feelings towards them based on exposure to the real lives of animals in their natural habitats. But is this happening? Some research in this area indicates that it is not. Learning about animals in school is often completely disconnected from the real lives of real animals, with the result that children often end up with little or no understanding or lasting knowledge of them. They learn factual information about animals, aimed at enabling them to identify them and have various abstract ideas about them, but that is the extent of their learning. Children’s storybooks tend to personify animals as characters rather than teach about them. For direct contact with wild and international animals, the only opportunity most children have is visiting a zoo. The educational benefit of this for children is often given as the main reason for doing it but research has shown that zoo visits seldom add to children’s knowledge of animals - the animals are simply like exhibits in a museum that the children look at without engaging with them as living creatures. Children who belong to wildlife or environmental organizations or who watch wildlife TV programmes, however, show significantly higher knowledge than any other group of children studied in research. The studies show that if children learn about animals in their natural habitats, particularly through wildlife-based activities, they know more about them than they do as a result of visiting zoos or learning about them in the classroom. Research has also been done into the attitudes of children towards animals. It shows that in general terms, children form strong attachments to individual animals, usually their pets, but do not have strong feelings for animals in general. This attitude is the norm regardless of the amount or kind of learning about animals they have at school. However, those children who watch television wildlife programmes show an interest in and affection for wildlife in its natural environment, and their regard for animals in general is higher
1. What could be the best title for the passage?

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The World Wildlife Fund (WWF) has issued a stark warning about the future of the world's natural World Heritage sites. It says half of the sites are at (1) ____ from different industries. The WWF warned that harmful industrial (2) ____ such as mining, dredging or drilling for oil are endangering the future of 114 of 229 sites. (3) ____ factors adding to the risk include illegal logging and unsustainable water use. All of these are in addition to the damage being (4) ____ by climate change. The WWF says the sites affected include Australia's Great Barrier Reef, the Grand Canyon National Park in the USA, and China's Sichuan Giant Panda Sanctuaries, which are home (5) ____ more than 30 per cent of the world's endangered pandas.  The director of the UNESCO World Heritage Centre said it was (6) ____ everyone to protect these sites. She said: "World Heritage is humankind's (7) ____ heritage, and the responsibility for its conservation is shared by everyone." She welcomed government efforts at reducing what they take from the Earth, saying: "The WWF's report comes at a time (8) ____ governments and the private sector around the world are stepping up their action against harmful extractive uses." However, the WWF said that more than 11 million people worldwide (9) _____ on World Heritage sites for food, water, shelter, jobs and medicine, and that non-stop development could harm (10) ____ as well as the environment

Fill in the gap with the most suitable provided words

There are (1)................. seasons in North of Vietnam. I like the spring and (2) ............ most. In the spring, it is warm and there are many kinds of (3) .............. blowing. I live in the countryside so the air is very fresh in the spring. The view looks like a beautiful picture. In the summer, it is very (4)............. I and my friends usually go (5)............... and (6) ................. our kites. Sometimes we (7) ............... fishing. I don't like the (8) .................. because the (9).................... is very cold and there is a lot of cold wind. I like living in the (10)......................

(2).....................

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Most adults struggle to recall events from their first few years of life and now scientists have identified exactly when these childhood memories are lost forever. A new study into childhood amnesia has found that it tends to take (31) _____ around the age of seven. The rapid decline of memories persisting while children are five and six is owing to the change in the way memories are formed. Before the age of seven, children tend to have an (32) _____ form of recall with no sense of time and place in their memories. In older children, however, the early recollected events tend to be more adult like in their content and the way they are formed. Faster rate of forgetting in children and higher turnover of memories means early memories are less likely to survive. (33) _____, memories of younger children tend to lack autobiographical narrative leading to a process known as ‘retrieval induced forgetting’ (34) _____ the action of remembering causes other information to be forgotten. Consequently, if childhood memories can survive into the ninth or tenth year of life, they may stay a chance of (35) _____ it into adulthood

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Over the past fifty years or so, the methods used for collecting money from the public to aid the developing world have changed out of all recognition, along with the gravity of the problems (1) ____, and the increasing awareness among the population that something must be done. At the beginning of this period, it would have been common to put money in a collecting box, perhaps on the street or at church. The 1960s saw the (2) ____ of shops which sold second-hand goods, donated by the public, and which also began to sell articles manufactured in the developing world in charitable projects set up to guarantee a fair income to local people. The next development was probably the charity 'event', in which participants were (3) ____ to run, cycle, swim or what have you, and collected money from friends and relatives (4) ____ how far or long they managed to keep going. The first hint of what was to become the most successful means of (5) ____ money was the charity record, where the artists donated their time and talent, and the (6) ____ from the sales went to a good cause. This was perhaps a (7) ____ of the fact that young people felt increasingly concerned about the obvious differences between life in Europe and the United States, and that in most of Africa, for example. A feeling of frustration was building up. Why was so little being done? The huge success of Band Aid, and (8) ____ televised concerts, showed the power of the media, and of music in particular, to inspire and shock. It differed significantly in style from other events. People phoned up in their thousands on the day and pledged money by (9) ____ their credit card numbers. (10) ____ if you have enough money to buy an MP3 player, you can afford something for the world's starving children

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When you wake up in the morning, do you assume that you're going to have a great day or that you're going to have a difficult day? If you normally have positive expectations, you might consider yourself an optimist, and if your expectations are usually negative, you may be a pessimist. According to research done by the Mayo Clinic, optimism can have a strong positive effect on your health. Their research shows that optimists may live longer, get colds less often, and be less likely to suffer from cardiovascular disease. Optimists may even deal with stress better than pessimists do. If you think you might be a pessimist and would like to try to be more optimistic, pay attention to what some call “self-talk.” The term “self-talk” refers to the automatic thoughts that go through your head all the time. You know-the ideas, worries, beliefs, and hopes that run through your mind as you're driving, washing dishes, folding laundry. Are those thoughts negative like, “Everyone knows so much more than I do,” or positive like, “I'm learning a lot at this job”? If your self-talk is negative, there are some things you can do to steer it in a more positive direction. First, you can simply stop your negative self-talk. Every time you catch yourself thinking something negative, you can stop yourself by actually saying, “Stop,” out loud. Alternatively, you can revise your self-talk. For example, if you catch yourself saying, “I’m terrible at giving presentations,” revise that to a question like, “How can I improve my presentation skills?” Another idea is to think of yourself as a friend. When you “hear” a negative sentence go through your mind, think about whether or not you would feel comfortable saying it to a friend. If the sentence seems too mean to say to a friend, think about what would sound better
3. The word “steer” in paragraph 4 is closest in meaning to _______

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The World Wildlife Fund (WWF) has issued a stark warning about the future of the world's natural World Heritage sites. It says half of the sites are at (1) ____ from different industries. The WWF warned that harmful industrial (2) ____ such as mining, dredging or drilling for oil are endangering the future of 114 of 229 sites. (3) ____ factors adding to the risk include illegal logging and unsustainable water use. All of these are in addition to the damage being (4) ____ by climate change. The WWF says the sites affected include Australia's Great Barrier Reef, the Grand Canyon National Park in the USA, and China's Sichuan Giant Panda Sanctuaries, which are home (5) ____ more than 30 per cent of the world's endangered pandas.  The director of the UNESCO World Heritage Centre said it was (6) ____ everyone to protect these sites. She said: "World Heritage is humankind's (7) ____ heritage, and the responsibility for its conservation is shared by everyone." She welcomed government efforts at reducing what they take from the Earth, saying: "The WWF's report comes at a time (8) ____ governments and the private sector around the world are stepping up their action against harmful extractive uses." However, the WWF said that more than 11 million people worldwide (9) _____ on World Heritage sites for food, water, shelter, jobs and medicine, and that non-stop development could harm (10) ____ as well as the environment

Read the reading below carefully, and then complete it with the best option A, B, C or D given below:
THE THREAT TO THE ENVIRONMENT
Nowadays people are more aware that wildlife all over the world is in danger. Many (1)________of animals are threatened, and could easily become (2)______ if we do not make an effort to protect them. There are many (3)_______ for this. In some cases, animals are hunted for their fur or for othervaluable parts of their bodies. Some birds, such as parrots, are caught (4)________and sold as pets. For many animals and birds, the problem is that their habitat - the (5)________where they live - is disappearing. More (6)________is used for farms, for houses or industry, and there are fewer open (7)________than there once were. Farmers use powerful chemicals to help them grow better (8)________, but these chemicals pollute the environment and (9)________wildlife. The most successful animals on earth - human beings - will soon be the only Ones left, unless we can (10)________this problem

Read the reading below carefully, and then complete it with the best option A, B, C or D given below:
The story of gold is an adventure involving kings, queens, pirates, explores, conquerors, andthe native peoples they conquered. Throughout history, gold had (1)_____a magic spellover those it touch. Gold is beautiful and rare; a soft shiny metal that can be moulded intomany(2)_____.It has been used for money, jewellery, and to decorate special buildings suchas palaces and places of worship. (3)_____the precious metal was discovered, prospectorsrushed to mine it, starting new cities and countries as they went. Gold and the people who love it have helped shape the world we live in today. Gold is one of many elements, orsubstances that cannot be changed by normal chemical (4)_____, that are found in theEarth’s crust. Gold has a warm, sunny colour and (5)_____it does not react (6)_____air,water, and most chemicals, its shine never fades. In its natural (7) _____, gold is soft andeasily shaped. When heated to 1,062 Celsius it melts and can be poured(8)_____ moulds toform coins, gold bars, and other objects. Stories have been told, movies (9)_____andlegends born about the (10)_____of the world’s great gold deposits. It is a saga of dreams,greed, ambition and exploration

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There are many types of family systems around the world. In North America and northern Europe, the nuclear family (with two generations - a father, a mother and one or more children) is often seen as the most typical. In contrast, in most other parts of the world, extended families, which include other family members such as grandparents, aunts, uncles and cousins, are seen as the norm.  The common view is that the nuclear family has become the norm in many Western societies as a result of industrialization and urbanization. This trend began in the late eighteenth and nineteenth centuries, when people were forced to move to cities to find work in the factories that sprang up during the Industrial Revolution. In the twentieth century, greater industrialization resulted in even more people leaving their large extended families. Urbanization also meant that people lived in much smaller houses, which were not big enough for an extended family.  The trend towards nuclear families meant that many of the duties and responsibilities of a family, such as providing food and shelter, cleaning the home, preparing the food, caring for children and their education, and caring for the sick and elderly are no longer shared among the members of the extended family. The parents (or parent) now have to do this, with some help from the state. However, this is the price that people pay for the higher standard of living that may come from living in a city.  We may think we know what we mean by a ‘nuclear' family and an extended family, but reality is more complicated than most people believe. Most nuclear families are part of extended families: children have grandparents and, in many cases, aunts, uncles and cousins as well. Part of what makes them ‘nuclear' is that they live in their own separate household, but it is not the whole story. In Greece or Italy, for example, a nuclear family may live in its own flat, but the extended family may live in the same apartment block or in the same street and family members see each other and even eat together every day.  There is at least one more factor to consider. Family members may be separated from each other by geographical distance, but they may have close emotional ties. Even in North America and northern Europe, grandparents usually have close bonds with their grandchildren, and families often travel long distances so that they can see each other. Grandparents often help their adult children, for example, by cooking and looking after their children in emergencies. In the same way, when their parents become too old to live on their own, adult children may take them into their own homes. As a result, they turn their nuclear family into an extended family.  The structure of families changes over time. The effects of urbanization and industrialization are enormous, but they are not the only reasons for the changes. People marry, have children, become widowed, divorce and die. Children grow up and adults grow old. Nuclear families become extended families and extended families become nuclear families. Family ties stay strong or become weak. One thing is certain: in a changing world, the family will continue to change, but ultimately, it is likely to continue to be the basic unit of society.  
2. The word "norm" in the passage mostly means ____

Fill the  A, B, C, D to complete statement:

Dear Peter,     

Thank you for your letter. It’s very interesting to know about schools in the USA.      

I think schools in Vietnam are a little different. Vietnamese students usually wear school uniform when they are at school. Classes start at 7.00 each morning and end at 11.15. Students have a 30-minute break after three periods. At break, many students play games. Some go to the canteen and buy something to eat or drink. Others talk together. Our school year lasts for nine months, from September to May. Then we have a three-month summer vacation.     

Please write soon and tell me about your summer vacation. 

Your friend, (Hoa)  

 Classes last from .... to a quarter past eleven a.m.

Choose the letter A, B, C or D to complete the passage below

Johnson __________ (1) a student. He’s 12 years old. He studies __________ (2) Ba Dinh secondary school on Hoang Hoa Tham Street. He usually __________ (3) home for school __________ (4) 6.30 a.m. He lives __________ (5) near the school, _________ (6) he usually walks to school with some of his friends. But today his father ___________ (7) him to school. He loves Literature and English. Today he has Physics, Chemistry and English. __________ (8) school, he often plays volleyball in the school field.

(3).......................

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Harvard University, today recognized as part of the top echelon of the world's universities, came from very inauspicious and humble beginnings.  This oldest of American universities was founded in 1636, just 16 years after the Pilgrims landed at Plymouth. Included in the Puritan emigrants to the Massachusetts colony during this period were more than 100 graduates of England's prestigious Oxford and Cambridge Universities, and these university graduates in the New World were determined that their sons would have the same educational opportunities that they themselves had had. Because of this support in the colony for an institution of higher learning, the General Court of Massachusetts appropriated 400 pounds for a college in October of 1636 and early the following year decided on a parcel of land for the school; this land was in an area called Newetowne, which was later renamed Cambridge after its English cousin and is the site of the present-day university.  When a young minister named John Harvard, who came from the neighboring town of Charlestowne, died from tuberculosis in 1638, he willed half of his estate of 1,700 pounds to the fledgling college. In spite of the fact that only half of the bequest was actually paid, the General Court named the college after the minister in appreciation for what he had done. The amount of the bequest may not have been large, particularly by today's standards, but it was more than the General Court had found it necessary to appropriate in order to open the college.  Henry Dunster was appointed the first president of Harvard in 1640, and it should be noted that in addition to serving as president, he was also the entire faculty, with an entering freshman class of four students. Although the staff did expand somewhat, for the first century of its existence the entire teaching staff consisted of the president and three or four tutors.  
8. The word "fledgling" in the passage could be best replaced by ____

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Many of the major supermarket chains have come under fire with accusations of various unethical acts over the past decade. They've wasted tons of food, they've underpaid their suppliers and they've contributed to excessive plastic waste in their packaging, which has had its impact on our environment. But supermarkets and grocers are starting to sit up and take notice. In response to growing consumer backlash against the huge amounts of plastic waste generated by plastic packaging, some of the largest UK supermarkets have signed up to a pact promising to transform packaging and cut plastic wastage. In a pledge to reuse, recycle or compost all plastic wastage by 2025, supermarkets are now beginning to take some responsibility for the part they play in contributing to the damage to our environment with one major supermarket announcing their plan to eliminate all plastic packaging in their own-brand products by 2023. In response to criticisms over food waste, some supermarkets are donating some of their food surplus. However, charities estimate that they are only accessing two per cent of supermarkets' total food surplus, so this hardly seems to be solving the problem. Some say that supermarkets are simply not doing enough. Most supermarkets operate under a veil of secrecy when asked for exact figures of food wastage, and without more transparency it is hard to come up with a systematic approach to avoiding waste and to redistributing surplus food. Some smaller companies are now taking matters into their own hands and offering consumers a greener, more environmentally friendly option. Shops like Berlin's Original Unverpakt and London's Bulk Market are plastic- tree shops that have opened in recent years, encouraging customers to use their own containers or compostable bags. Online grocer Farmdrop eliminates the need for large warehouses and the risk of huge food surplus by delivering fresh produce from local farmers to its customers on a daily basis via electric cars, offering farmers the lion's share of the retail price. There is no doubt that we still have a long way to go in reducing food waste and plastic waste. But perhaps the major supermarkets might take inspiration from these smaller grocers and gradually move towards a more sustainable future for us all.
2. According to paragraph 2, more and more people want supermarkets to _______

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Scientists agree that the earth's rising temperatures are fueling longer and hotter heat waves, more frequent droughts, heavier rainfall, and more powerful hurricanes. In 2015, for example, scientists said that an ongoing drought in California - the state's worst water shortage in 1,200 years - had been intensified by 15 percent to 20 percent by global warming. They also said the odds of similar droughts happening in the future had roughly doubled over the past century. And in 2016, the National Academies of Science, Engineering, and Medicine announced that it's now possible to confidently attribute certain weather events, like some heat waves, directly to climate change.  The earth's ocean temperatures are getting warmer, too - which means that tropical storms can pick up more energy. So global warming could turn, say, a category 3 storm into a more dangerous category 4 storm. In fact, scientists have found that the frequency of North Atlantic hurricanes has increased since the early 1980s, as well as the number of storms that reach categories 4 and 5. In 2005, Hurricane Katrina - the costliest hurricane in U.S. history struck New Orleans; the second - costliest, Hurricane Sandy, hit the East Coast in 2012.  The impacts of global warming are being felt across the globe. Extreme heat waves have caused tens of thousands of deaths around the world in recent years. And in an alarming sign of events to come, Antarctica has been losing about 134 billion metric tons of ice per year since 2002. This rate could speed up if we keep burning fossil fuels at our current pace, some experts say, causing sea levels to rise several meters over the next 50 to 150 years.   
2. Which of the following is NOT mentioned as a consequence of the earth's rising temperatures?

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Planet earth is part of a system of planets and their moons, as well as numerous asteroids and comets which (26)_________around a huge star we call the Sun. The Sun itself (27)_________of gas. Nuclear reactions inside its core (28)_______the heat and light that make life on the Earth (29)________. The Earth is the third of four small terrestrial (Earth like) planets that orbit close to the (30)_________. Further out in our Solar System are four huge gas planets, while distant Pluto, (31)_________planet, is made (32)_________rock and ice. Our Earth is one of the ten planets that orbit the Sun- a huge, burning-hot star in the center of our Solar System. The Solar System and all the stars in the (33)_________are part of our galaxy-the Milky Way, which (34)________as many as 200 billions stars. Beyond our galaxy (35)_________millions more galaxies. They all add together to make up the Universe