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According to the report, we can expect some pretty remarkable changes to our homes  and our personal spaces, overlooked things that make up so much of our daily routine. As human populations soar, our cities and homes will have to adapt; interior living spaces will change as a cloud changes, easily reconfigured and rearranged to suit our fickle tastes, or accommodate different purposes.  Imagine walls and floors made of a malleable “skin,” and embedded with tiny sensors and actuators so that the shape and size of living spaces can quickly change, or even be divided into smaller rooms; imagine fully programmable “smart homes” that can be controlled remotely, and provide feedback to their owners - yes, there’ll even be an app for that.  Virtual decorations will alter with changing tastes, moods and whims; and the entire interior surface of the home will be implanted with LED technology - television screens and computer displays will form and unform in any room, as needed. Even our furniture will be adaptable, molding to custom fit our bodies, responding to changes in posture, or disappearing altogether when not needed.  It will be the ultimate evolution of the “Internet of Things.” Misplaced something? Can’t find your keys? No problem. Just use an online search function to find it. Hate the color of that accent wall? Delete it. Need more storage space? Watch new shelves appear, as if by magic. And the amenities are fantastic. Every home will come standard with a 3D printer; they’ll be able to churn out just about anything you could wish, using downloadable patterns, probably including even complex electronic devices. They may even print out your meals, designed and programmed by the world’s master chefs.  Walk-in “medical pods,” meanwhile, will contribute to the decentralization of healthcare - their imaging sensors will diagnose your ills and, for the more easily treatable maladies, dispense drugs, inject antibiotics, and recommend health regimens. It may even be possible to undergo remote, robot-mediated surgery, in the comfort of your own home.  This barely scratches the surface. Imagine homes whose very building material is salted with dormant limestone-producing bacteria, which awaken upon contact with moisture and repair any cracks or structural damage.  There will be “digestion tanks” full of anaerobic bacteria, to dispose of our waste; and our homes will produce, store, and reuse their own energy, using “microbial fuel cell stacks” and more efficient solar panels to generate electricity, and power-banks like the Tesla power wall to store it against future use. Personal homes will be almost fully independent of a dangerously overtaxed energy grid.  One hundred years in the future, our houses will be, in almost all respects, semiliving, artificial organisms - closed systems with a metabolism, sensory apparatus, immune response, and an approximation to a nervous system. We’ll be living in homes that are practically alive.
1. Which of the following does the passage mainly discuss?

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This is called a product of Bat trang pottery __ it was made in Bat trang village.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions:
When another old cave is discovered in the south of France, it is not usually news.
Rather, it is an ordinary event. Such discoveries are so frequent these days that hardly anybody pays heed to them. However, when the Lascaux cave complex was discovered in 1940, the world was amazed. Painted directly on its walls were hundreds of scenes showing how people lived thousands of years ago. The scenes show people hunting animals, such as bison or wild cats.
Other images depict birds and, most noticeably, horses, which appear in more than 300 wall images, by far outnumbering all other animals.
Early artists drawing these animals accomplished a monumental and difficult task. “They” did not limit themselves to the easily accessible walls but carried their painting materials to spaces that required climbing steep walls or crawling into narrow passages in the Lascaux complex.
Unfortunately, the paintings have been exposed to the destructive action of water and temperature changes, which easily wear the images away. Because the Lascaux caves have many entrances, air movement has also damaged the images inside. Although they are not out in the open air, where natural light would have destroyed them long ago, many of the images have deteriorated and are barely recognizable. To prevent further damage, the site was closed to tourists in 1963, 23 years after it was discovered.

In line 12, the word “They” refers to ………………...

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Gujarat’s favourite watering hole, Union territory of Daman, will add more activity  for its tourists than let them hang around only in the bars on its sun-kissed beaches. The administration has decided to develop leisure water sports on Jampore and Light house beaches at Moti Daman. The tourism department of Daman has already selected two operators to run these leisure water sports facilities. At present, facilities like creation of ramps, walking area and waiting area for the tourists are under construction at the beaches.  Director of Daman Tourism, Harshil Jain told TOI, “The leisure water sports activities are all set to start very soon. We have not decided the dates, but the contractors are working day-and-night to set up facilities soon at both the beaches.” He further said that leisure water sports will help boost tourism in Daman. “The flow of tourist will increase during the vacation period. Till now, tourists come here to enjoy sitting on the beaches, but now they will have the option for water sports, too,” Jain added.  According to tourism department officials, the sporting activity would be set up on the lines of Goa. Attractions like jet skis, banana ride, para sailing, pedal boating, rowing, kayaking and motorboating will add to the beach fun, they said. A senior tourism officer said, “Since adventure has a risk factor, we have asked the contractors to keep provision of accidental insurance cover for all the tourists using the ride. Customers too must be covered for accidental death, loss of limb and permanent and partial disability.” “On the weekends alone, more than 60,000 people visit Daman. We are pretty sure that the water sports activity will increase the numbers to more than 80,000,” asserted another official. 
1. Which best serves as the title for the passage?

Find synonym:
The urban planners are working for Eco Infrastructure Network, whose main function is to deal with urban environmental problems to make Super Star City greener, cleaner, and more sustainable.

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

   The White House, the official home of the United States president, was not built in time for George Washington to live in it. It was begun in 1792 and was ready for its first inhabitants. President and Mrs.John Adams, who moved in on November 1, 1800. When the Adamses moved in, the White House was not yet complete, and the Adamses suffered many inconveniences; for example, the main staircase was incomplete, which hindered movement from floor to floor, and the future laundry yard was merely a pool of mud, so wet laundry was hung in the unfinished East Room to dry. Thomas Jefferson, the third president, improved the comfort of the White House in many respects and added new architectural features such as the terraces on the east and west ends.

   When the British forces burned the White House on August 24, 1814, President Madison was forced to leave.All the remained after the fire was the exterior walls, the interior was completely destroyed. It was not until December of 1817 that the following president, James Monroe, was able to move into a rebuilt residence. Since then, the White House has continued to be modified but has been continuously occupied by each succeeding U.S president.

The word “forces” in line 9 could best be replaced by:

Read the following passage and choose the best answer (A, B, C, D):
Practical experience is a must-have for today’s job seekers. According to Brazen Life’s Huffington Post article titled “Why Gaining Work Experience Is More Important Than Your Education,” many colleges and universities report that students who have completed an internship or gained work experience during their studies have higher rates of getting hired. For example, at Iowa State University, of all students who completed a co-op program to earn a BS in engineering, an astounding 90 percent got jobs after graduation. Why is practical experience so important? There are a number of reasons why you need practical work experience. First, it’s simply the smart thing to do when you’re preparing for a career in a specific field. Let’s say it’s your dream to work as a consultant for an international corporate relocation company because you love international travel and you like organizing things. So you get a part-time job working as an office assistant at a corporate relocation company… and you find out it’s very different from what you expected. In short, you realize this isn’t the job for you-and you can concentrate on finding another job where you can put your passion and skills to work, for example in the tourism industry. Alternatively, you might find out that you enjoy the corporate relocation business. That means you’re gaining invaluable industry experience that will look great on your resumé when you apply for a full-time job.  Second, practical work experience teaches valuable soft skills, such as discipline, perseverance, teamwork, leadership skills, communication skills and problem solving. Employers will look for these in candidates and they’ll want to see proof. If you’ve spent a month as a team leader at Homes for Heroes, the leadership skills, teamwork experience and problem-solving abilities you developed there can add significant value to your candidacy. Third, working helps you build your network and can provide you with contacts in your chosen field. These contacts can be extremely useful when it comes to hearing about job leads and interesting opportunities. In addition, if you’ve impressed someone, he or she might be willing to write you a letter of recommendation for a job or a place in a graduate program.  Finally, the company you’re working for might offer you a position after you’ve graduated. Your employer already knows your skills and abilities, and you’re already acquainted with the company-so it’s a win-win situation! 
3. According to paragraph 2, what is the outcome for when you have finished an early working experience?

Read the following passage and choose the best answer (A, B, C, D)
Men have always played critical roles in the women’s movement. But there is still a long way to go because despite all the progress made, men still dominate positions of power. And, as a string of recent harassment scandals has shown, the behaviour of some men has had profound effects on women’s careers, their success and their lives. The good news, as we mark International Women’s Day, is that many men are acknowledging the importance of playing their part to make gender equality a reality. A new study by Ipsos Mori has found that while a third of British men think they are being expected to do too much to support women’s equality, far more – half – do not. In fact, three in five men in Britain agree that gender equality won’t be achieved unless they also take action to support women’s rights. Despite attempts in some quarters to paint gender equality as a zero-sum game, there are plenty of win-win propositions for these men to advocate. Better parental leave for fathers would be a good start. Government policy needs to catch up with this new reality, and the evidence is clear that, unless paternity leave is non-transferable and well paid, uptake will be low. Sweden and Norway show us that the introduction of the “daddy quota” – the period of parental leave reserved specifically for fathers – has a positive effect on male take-up of parental leave, and then on men’s long-term involvement in household work and childcare. This reaps economic dividends, as women’s talents are no longer lost to the labour force, and having an involved father has a positive effect on children’s wellbeing. Globally, three-quarters (72%) agree that employers should make it easier for men to combine childcare with work. Businesses need not fear: research links flexible working to increased productivity, as better work-life balance leads to happier, more effective workers. Women gain from having flexible partners, too. A study of German couples found that having a partner who works flexibly boosted the wages of men and women, with the effect most pronounced for mothers. Conversely, women whose partners work very long hours are significantly more likely to quit the labour force – taking their talent and experience with them
7. Which of the following statements is TRUE, according to the passage?

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Around the world, Rio de Janeiro is famous for its beautiful beaches, and Carnival celebration. But the city is also known for its poor areas, known as favelas. For years, many favelas had high poverty and crime rates. However, things are starting to change. In the past, many favelas received very little government assistance. Neighbourhood residents had to build their own streets and homes. Gangs were also common, and so were guns. However, a new government plan is starting to change this. The city is sending thousands of police officers into favelas with the goal of driving out the gangs. In some favelas, the plan is already working. Crime is down, and unlike the past, children are playing in the streets again. New apartment buildings are being built, and the city is providing more services. “In 20 years,’ says police officer Leonardo Nogueira, “the children who live here now will be different people.” Police influence is changing the favelas, but something else is, too. Today, more Brazilians are moving into these neighbourhoods because housing is expensive in other parts of Rio. “Favelas are a place for young doctors without money to get started and young architects to start working,” explains Simone Miranda, a Rio tour guide. In the past, favela residents felt different – separate from the rest of Rio. “But now,” says Miranda, “they feel part of the society of Brazil.” Life is improving in the favelas, but there are still challenges. In some areas, poverty rates are still high. As students, families, and foreigners move into the favelas, property costs skyrocket. In some areas, housing has more than doubled in price. Despite this, favela residents are hopeful. If Rio can develop these favelas for all residents – both poor and middle class the city could become a model for other cities with similar problems. 
2. Which of these things found in favelas is NOT mentioned in the passage?

Each sentence has a mistake. Find it bychosing A B C or D

Water pollution can kill a large number of fish, birds, but other animals; in some cases it may kill all members of a species in an affected area

Read the following passage and choose the best answer (A, B, C, D):
200 years ago there were less than one billion humans living on earth. Today, according to UN calculations there are over 7 billion of us. Recent estimates suggest that today’s population size is roughly equivalent to 6.9% of the total number of people ever born. This is the most conspicuous fact about world population growth: for thousands of years, the population grew only slowly but in recent centuries, it has jumped dramatically. Between 1900 and 2000, the increase in world population was three times greater than during the entire previous history of humanity—an increase from 1.5 to 6.1 billion in just 100 years. How the world population is changing is of great importance for humanity’s impact on the Earth’s natural environment, but it also gives reasons to hope for a good future. This is because we have a bigger team of better educated people who can contribute to the solutions that improve global well-being. A picture of the world population in the very long-run shows extremely rapid growth. Indeed, for a long time the world population grew at an increasing rate. However, if we focus on the last couple of decades, we see that this pattern no longer holds, as the annual rate of population growth has been recently going down. 1962 saw the growth rate peak at 2.1%, and it has since fallen to almost half. A long historical period of accelerated growth has thus come to an end. Based on these observations, world history can be divided into three periods marked by distinct trends in population growth. The first period, pre-modernity, was a very long age of very slow population growth. The second period, beginning with the onset of modernity— which was characterized by rising standards of living and improving health—had an increasing growth rate that continued to rise through 1962. Today, the second period is over, and the third period is unfolding; the population growth rate is falling and will likely continue to fall, leading to an end of population growth towards the end of this century.  
6. The word “trend” in the last paragraph can be best replaced by ______

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The Internet is very much like television, in which it takes time away from other pursuits, provides entertainment and information, but in no way can compare with the warm, personal experience of reading a good book. This is not the only reason why the Internet will never replace books, for books provide the in-depth knowledge of a subject that sitting in front of a computer monitor cannot provide. We can download text from an Internet source, but the aesthetic quality of sheets of downloaded text leave much to be desired. A welldesigned book enhances the reading experience. The book is still the most compact and inexpensive means of conveying a dense amount of knowledge in a convenient package. The easy portability of the book is what makes it the most user-friendly format for knowledge ever invented. The idea that one can carry in one’s pocket a play by Shakespeare, a novel by Charles Dickens or Tom Clancy, Plato’s Dialogues, or the Bible in a small paperback edition is mind-boggling. We take such uncommon convenience for granted, not realizing that the book itself has undergone quite an evolution since the production of the Gutenberg Bible in 1455 and Shakespeare’s First Folio in 1623, just three years after the Pilgrims landed at Plymouth to colonize the New World. Not only has the art and craft of printing and book manufacturing been greatly improved over the centuries, but the great variety of subject matter now available in books is astounding, to say the least. In fact, the Internet requires the constant input of authors and their books to provide it with the information that makes it a useful tool for exploration and learning.  Another important reason why the Internet will never replace books is because those who wish to become writers want to see their works permanently published as books - something you can hold, see, feel, skim through, and read at one’s leisure without the need for an electric current apart from a lamp. The writer may use a word processor instead of a typewriter or a pen and pad, but the finished product must eventually end up as a book if it is to have value to the reading public. The writer may use the Internet in the course of researching a subject just as he may use a library for that purpose, but the end product will still be a book.
4. Which of the following is mentioned as the advantage of books in paragraph 2?

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Although television was first regarded by many as “radio with pictures,” public reaction to the arrival of TV was strikingly different from that afforded the advent of radio. Radio in its early days was perceived as a technological wonder rather than a medium of cultural significance. The public quickly adjusted to radio broadcasting and either enjoyed its many programs or turned them off. Television, however, prompted a tendency to criticize and evaluate rather than a simple on-off response. One aspect of early television that can never be recaptured is the combined sense of astonishment and glamour that greeted the medium during its infancy. At the midpoint of the 20th century, the public was properly agog about being able to see and hear actual events that were happening across town or hundreds of miles away. Relatively few people had sets in their homes, but popular fascination with TV was so pronounced that crowds would gather on the sidewalks in front of stores that displayed a working television set or two. The same thing happened in the typical tavern, where a set behind the bar virtually guaranteed a full house. Sports events that might attract a crowd of 30,000 or 40,000 suddenly, with the addition of TV cameras, had audiences numbering in the millions. By the end of television’s first decade, it was widely believed to have greater influence on American culture than parents, schools, churches, and government-institutions that had been until then the dominant influences on popular conduct. All were superseded by this one cultural juggernaut. The 1950s was a time of remarkable achievement in television, but this was not the case for the entire medium. American viewers old enough to remember TV in the ’50s may fondly recall the shows of Sid Caesar, Jackie Gleason, Milton Berle, and Lucille Ball, but such high-quality programs were the exception; most of television during its formative years could be aptly described, as it was by one Broadway playwright, as “amateurs playing at home movies.” The underlying problem was not a shortage of talented writers, producers, and performers; there were plenty, but they were already busily involved on the Broadway stage and in vaudeville, radio, and motion pictures. Consequently, television drew chiefly on a talent pool of individuals who had not achieved success in the more popular media and on the young and inexperienced who were years from reaching their potential. Nevertheless, the new medium ultimately proved so fascinating a technical novelty that in the early stages of its development the quality of its content seemed almost not to matter. Fortunately, the dearth of talent was short-lived. Although it would take at least another decade before areas such as news and sports coverage approached their potential, more than enough excellence in the categories of comedy and drama emerged in the 1950s to deserve the attention of discriminating viewers. They are the most fondly remembered of the Golden Age genres for both emotional and intellectual reasons. Live TV drama was, in essence, the legitimate theatre’s contribution to the new medium; such shows were regarded as “prestige” events and were afforded respect accordingly. The comedies of the era are remembered for the same reason that comedy itself endures: human suffering and the everelusive pursuit of happiness render laughter a necessary palliative, and people therefore have a particular fondness for those who amuse them  
6. The word “dearth” in the last paragraph is closest in meaning to ______

Each sentence has a mistake. Find it bychosing A B C or D

An extend family consists not only of parents and children but also of other relatives, such as grandparents and unmarried aunts and uncles

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Certain birds are, more often than not, considered bad luck, or even a sign of impending death. For example, all over the world, both crows and ravens have some connection to war, and death. In early times, crows and ravens were thought to accompany the gods of war, or be signs of the gods’ approaching arrival. This idea later changed. Crows in particular were thought to be harbingers of ill fortune or, in some cases, guides to the afterlife. Woe be it to the person who saw a single crow or raven flying overhead, for this was most certainly a portent of death in the near future. Interestingly, though potentially bad luck for people individually, the raven is considered to be good luck for the crown of England. So much so, in fact, that a “raven master” is, even today, an actual government position in London. He takes care of the ravens there and also clips their wings, ensuring that these birds can never fly far from the seat of the British government. This way, the kingdom will never fall to ill fortune. Another bird that is thought to play a part in forecasting the fortunes of people is the swallow. Depending on how and when it is seen, the swallow can be a harbinger of either good or ill fortune. Perhaps inspired by the swallow’s red-brown breast, Christian people initially related the swallow to the death of Jesus Christ. Thus, people who saw a swallow fly through their house considered it a portent of death. Later, however, farmers began to consider swallows signs of good fortune. Any barn that has swallows living in it is sure to be blessed in the following year. Farmers also have to beware of killing a swallow; that would be certain to end any good luck they might have had. Though many people think these superstitions are old wives’ tales, there is actually some evidence to support them. For example, crows and ravens, being scavengers, appear at the aftermath of battles. Thus, large numbers of crows and ravens could be good indications of war in an area. As well, swallows feed on insects that can cause infections in cattle. Thus, a farmer who has many swallows in his barn may actually have healthier animals on his farm. Therefore, the next time you feel inclined to laugh at an old wives’ tale, maybe you had better find out if there is any truth to it first!
5. As mentioned in the passage, the swallow originally was considered as ___________

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Are you preparing for a big test? If so, you may want to play some basketball in between hitting the books. Based on information they have collected over the years, researchers have seen an apparent connection between exercise and brain development. Judy Cameron, a researcher at Oregon Health and Science University, studies brain development. According to her research, it seems that exercise can make blood vessels, including those in the brain, stronger and more fully developed. Cameron claims this allows people who exercise to concentrate better. She says, “While we already know that exercise is good for the heart, exercise can literally cause physical changes in the brain.” The effects of exercise on brain development can even be seen in babies. Babies who do things that require a lot of movement and physical activity show greater brain development than babies who are less physically active. With babies, even a little movement can show big results. Margaret Barnes, a pediatrician, believes in the importance of exercise. She thinks that many learning disabilities children have in elementary school or high school can be traced back to a lack of movement as babies. “Babies need movement that stimulates their five senses,” says Barnes. “They need to establish a connection between motion and memory. In this way, as they get older, children will begin to associate physical activity with higher learning.” The benefits of exercise on the brain are not just for babies. Older people can beef up their brains by working out as well. Researchers at Cornell University studied a group of seniors ranging in age from seventy to seventy-nine. Their study showed a short-term memory increase of up to forty percent after exercising just three hours a week. The exercise does not have to be very difficult, but it does have to increase the heart rate. Also, just like the motion for infants, exercise for older people should involve some complexity. Learning some new skills or motions, such as with yoga or tai-chi, helps open up memory paths in the brain that may not have been used for a long time  
5. According to the last paragraph, the elderly should do some exercise that __________

Choose the best answer:
A hydroelectric dam ______________ in this area now.

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A good memory is often seen as something that comes naturally, and a bad memory as something that cannot be changed, but actually (1)______ is a lot that you can do to improve your memory. We all remember the things we are interested in and forget the ones that bore us. This no doubt explains the reason (2)______ schoolboys remember football results effortlessly but struggle with dates from their history lessons! Take an active interest in what you want to remember, and focus on it (3)______. One way to ‘make’ yourself more interested is to ask questions — the more the better! Physical exercise is also important for your memory, because it increases your heart
(4)______ and sends more oxygen to your brain, and that makes your memory work better. Exercise also reduces stress, which is very bad for the memory. The old saying that “eating fish makes you brainy” may be true after all. Scientists have discovered that the fats (5)______ in fish like tuna, sardines and salmon — as well as in olive oil — help to improve the memory. Vitamin-rich fruits such as oranges, strawberries and red grapes are all good brain food‘, too.

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For nearly all of human history, there haven’t been that many of us. Around the year zero, Earth’s population is estimated to have been 190 million. A thousand years later, it was probably around 250 million. Then the Industrial Revolution happened, and human population went into overdrive. It took hundreds of thousands of years for humans to hit the 1 billion mark, in 1800. We added the next billion by 1928. In 1960, we hit 3 billion. In 1975, 4 billion. That sounds like the route to an overpopulation apocalypse, right? To many midcentury demographers, futurists, and science fiction writers, it certainly predicted one. Extending the timeline, they saw a nightmarish future ahead for humanity: human civilizations constantly on the brink of starvation, desperately crowded under horrendous conditions, draconian population control laws imposed worldwide. Stanford biologist Paul Ehrlich wrote in his best-selling book, “In the 1970’s, hundreds of millions of people will starve to death” because of overpopulation. None of that ever came to pass. The world we live in now, despite approaching a population of nearly 8 billion, looks almost nothing like the one doomsayers were anticipating. Starting in the 19th century in Britain and reaching most of the world by the end of the 20th century, birthrates plummeted — mostly because of women’s education and access to contraception, not draconian population laws. In wealthy societies where women have opportunities outside the home, the average family size is small; in fact, it’s below replacement level. Called the demographic transition, it is one of the most important phenomena for understanding trends in global development.  There’s still significant debate among population researchers about the extent of the sea change in population trends. Researchers disagree on whether global populations are currently on track to start declining by midcentury. There’s also disagreement on what the ideal global population figure would be, or whether it’s morally acceptable to aim for such a figure. While academic research seeks to nail down these questions, it’s important to be clear what is consensus among researchers. Our projections around population are used to make global health and development policy. They’re critical for planning, especially about climate change. Fears of overpopulation sometimes turn into hostility to immigrants, those who choose to have large families, and countries in an earlier stage of their population transition. Having an informed conversation about population is crucial if we are to get humanity’s future right.  
3. According to paragraph 2, what was the situation for population concerns in the late 1900s?

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A Tidal Stream Generation system reduces some of the environmental effects of tidal barrages by using turbine generators beneath the surface of the water. Major tidal flows and ocean currents, like the Gulf Stream, can be exploited to extract its tidal energy using underwater rotors and turbines. Tidal stream generation is very similar in principle to wind power generation. Water currents flow across a turbines rotor blades which rotates the turbine, much like how wind currents turn the blades for wind power turbines. In fact, tidal stream generation areas on the sea bed can look just like underwater wind farms. Unlike off-shore wind power which can suffer from storms or heavy sea damage, tidal stream turbines operate just below the sea surface or are fixed to the sea bed. Tidal streams are formed by the horizontal fast flowing volumes of water caused by the ebb and flow of the tide as the profile of the sea bed causes the water to speed up as it approaches the shoreline. As water is much more denser than air and has a much slower flow rate, tidal stream turbines have much smaller diameters and higher tip speed rates compared to an equivalent wind turbine. Tidal stream turbines generate tidal power on both the ebb and flow of the tide. One of the disadvantages of Tidal Stream Generation is that as the turbines are submerged under the surface of the water they can create hazards to navigation and shipping. Other forms of tidal energy include tidal fences which use individual vertical-axis turbines that are mounted within a fence structure, known as the caisson, which completely blocks a channel and force water through them. Another alternative way of harnessing tidal power is by using an “oscillating tidal turbine”. This is basically a fixed wing called a Hydroplane positioned on the sea bed. The hydroplane uses the energy of the tidal stream flowing past it to oscillate its giant wing, similar to a whales flipper, up and down with the movement of the tidal currents. This motion is then used to generate electricity. The angle of the hydroplane to the flow of the tide can be varied to increase efficiency. Tidal energy is another form of low-head hydro power that is completely carbon neutral like wind and hydro energy. Tidal power has many advantages compared to other forms of renewable energy with its main advantage being that it is predictable. However, like many other forms of renewable energy, tidal energy also has its disadvantages such as its inflexible generation times dependant upon the tides and the fact that it operates in the hostile conditions of the oceans and seas
7. The word “renewable” in the last paragraph mostly means ______

Mark the letter A, B, C, or D on your answer sheet to indicate the undelined part that needs correction in each of the following questions:
These days, most people in Britain and the US do not wear very formal clothes. But sometimes it is important to wear the right thing.
Many British people don't think about clothes very much. They just like to be comfortable. When they go out to enjoy themselves, they can wear almost anything. At theatres, cinemas and concerts you can put on what you like from elegant suits and dresses to jeans and sweaters. Anything goes, as long as you look clean and tidy.
But in Britain, as well as in the US, men in offices usually wear suits and ties, and women wear dresses or skirts (not trousers). Doctors, lawyers and business people wear quite formal clothes. And in some hotels and restaurants men have to wear ties and women wear smart dresses.
In many years, Americans are more relaxed than British people, but they are more careful with their clothes. At home, or on holiday, most Americans wear informal or sporty clothes. But when

they go out in the evening, they like to look elegant. In good hotels and restaurants, men have to wear jackets and ties, and women wear pretty clothes and smart hairstyles.
It is difficult to say exactly what people wear informal or formal in Britain and the US, because everyone is different. If you are not sure what to wear, watch what other people do and then do the same. You'll feel more relaxed if you don't look too different from everyone else.

If you are in a foreign country, the best way the writer suggests to you is to wear .