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Read the article and select the best answer. Article: Directions : Read the following three passages. Each passage is followed by several questions or unfinished statements. For each of them there are 4 choices marked A,B, C and D. Choose the one that fits best according to the information given in the passage When top engineers in Germany wanted to build a more energy-efficient car, they headed to the natural history museum to study dolphins and sharks. But it was the boxfish that interested them. "We were surprised when this clumsy-looking fish became our model for designing an aerodynamic car",says Thomas Weber. He is the research and development chief for the car company Daimler. An aerodynamic design reduces wind drag and increases fuel efficiency. The boxfish may look clumsy, but it can start, stop ,back up and zigzag through the water with ease. And it does all this using surprisingly little energy. Daimler's bionic car is modeled on the fish's boxy skeletal system. Like the fish, the car is fast and drives easily. It's efficient too. The science behind nature-inspired inventions is called biomimicry . Biologist Janine Benyus came up with the term. As co-founder of the Biomimicry Guild, she has worked with cereal companies,sneaker designers and others to develop products based on Nature's best ideas. This month ,the Nature's 100 Best List will be revealed at the World Conservation Congress in Barcelona ,Spain. Benyus co-authored the list of nature inspired designs with economist Gunter Pauli. In Zimbabwe ,a country in southern Africa ,engineers designed energy-efficient buildings modeled on termite mounds . The buildings use vents to keep the air flowing and the temperature cool. A company in Atlanta ,US ,developed a self-cleaning paint modeled on the lotus leaf. When the paint dries ,it becomes bumpy ,just like the lotus leaf. Rain drops form on the bumps and roll off ,carrying dirt along with them. Nature has done billions of years of research. Only the best-designed products have survived. Companies owe Mother Nature a debt for all that... Question: What's the main idea of the passage? Options: A: How Daimler's bionic car came into being. B: Nature has inspired a lot of inventions and will continue to. C: Scientists and inventors' contribution to modern industry comes from nature. D: The Nature's 100 best list.
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B

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Read the article and select the best answer. Article: In your opinion,what is the most effective way to deal with pressure?Do you think the measure taken by Tufts University is useful? Tufts University has offered extra help around test time to students. Now they're adopting new stress-fighting methods to help the students, who face a tough job market as well as finishing the term. From free massages to therapy dog visits, students are getting help during those days before turning in final papers and taking final exams. "I think these dogs make me happy and give me a nice break between learning, cutting the learning into small pieces,"19-year-old Tufts student Chloe Wong said. She called her first term "challenging", because she has spent weeks away from family and friends and was afraid she would lose her cool in her first set of final exams. But they now get chances to relax and play with these lovely dogs that head teacher Michael Bliss brought in for them. They can set down their books and laptops for a chance to the pet. Therapy dogs have long been used to cheer the sick and the elderly up. But the university is accepting the idea as a way of relieving stress and comforting students. Brian Van Brunt, president of the American College Counseling Association, said, "College students are very stressed at this point of the year and some are trying to catch up with their peers. Going to events like this allows students to clear the brain and press there set button." Question: According to the passage ,therapy dogs have long been used to _ . Options: A: make the parents feel more painful B: stop the elders from feeling upset C: be good partners for the students to play with D: help the college students feel relaxed and easy
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B

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Read the article and select the best answer. Article: Every year there are changes in climate in different parts of the world.Some of these changes are due to natural causes.However,some climate changes are caused by air pollution and these changes may increase. If the pollution affects the level of carbon dioxide in the atmosphere,the results are likely to be serious.There is only a small part of carbon dioxide in the atmosphere.But it has an important function in keeping the balance between radiation from the sun entering the atmosphere and radiation leaving the Earth.Some of the radiation is absorbed by the Earth and some is radiated back into the atmosphere.The carbon dioxide in the atmosphere prevents some of the radiation from leaving the atmosphere.Thus the heat remains in the atmosphere and carbon dioxide helps to prevent the temperature of the Earth from falling. If the proportion of carbon dioxide in the atmosphere is increased as a result of air pollution,the temperature of the atmosphere may rise.This might cause the ice in the North and South to melt.If this happened,the sea level could rise and parts of the Earth would be flooded.This is not quite likely but the possibility exists. There is also a fairly strong possibility that the dust level in the atmosphere will rise as a result of industrial pollution.This dust pollution will reflect sunlight back onto space.If this happens,less sunlight will reach the Earth and the temperature will fall. Another danger comes from the destruction of the Earth's vegetation such as the forest of Brazil,which is being cleared away for farmland and cities.Trees use carbon dioxide and their destruction may upset the balance of carbon dioxide in the atmosphere. Question: From this passage we learn that carbon dioxide _ . Options: A: helps to prevent the temperature of the Earth from rising B: keeps much of the sun's radiation from entering the atmosphere C: plays an important part in keeping the balance of the temperature of the Earth D: is one of natural causes of climate changes
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C