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I'm taking a test and have to guess the right answer to the question after the article. Article: Believe it or not, optical illusion can cut highway crashes. Japan is a case in point. It has reduced automobile crashes on some roads by nearly 75 percent using a simple optical illusion. Bent strips, called chevrons , painted on the roads make drivers think that they are driving faster than they really are, and thus drivers slow down. Now the American Automobile Association Foundations For Traffic Safety in Washington D.C. is planning to repeat Japan's success. Starting next year, the foundation will paint chevrons and other patterns of stripes on selected roads around the country to test how well the patterns reduce highway crashes. Excessive speed plays a major role in as much as one fifty of all fatal traffic accidents, according to the foundation. To help reduce those accidents, the foundation will conduct its tests in areas where speed-related hazards are the greatest-curves, exit slopes, traffic circles, and bridges. Some studies suggest that straight, horizontal bars painted across roads can initially cut the average speed of drivers in half. However, traffic often returns to full speed within months as drivers become used to seeing the painted bars. Chevrons, scientists say, not only give drivers the impression that they are driving faster than they really are but also make a lane appear to be narrower. The result is a longer lasting reduction of highway speed and the number of traffic accidents. Question: On roads painted with chevrons, drivers tend to feel that _ . Options: A: they should avoid speed-related hazards B: they are driving in the wrong lane C: they should slow down their speed D: they are coming near to the speed limit
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C

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I'm taking a test and have to guess the right answer to the question after the article. Article: Venice is the "Queen" of the Adriatic Sea . Every year thousands of people from all over the world travel to Italy to visit the city. Do you know why they like to go there for a visit? Venice is a very beautiful city. It is quite different from other cities in the world. There aren't any roads and streets in the city. So there aren't any cars and buses. There are many canals in the city. There is one big canal and one hundred and seventy-seven small canals. People move up and down the canals in boats to go to work, go shopping or visit their friends. But Venice is sinking. It is going down and the water is going up. In 2040Venice will be under water, The Adriatic Sea will cover the city. The Venetians love their city and want to stay there. So they want to save Venice? They can build some strong huge walls and gates in the sea. The gates will close to keep too much water out. Thus Venice will not sink. Question: The Venetians usually go to work or visit their friends _ . Options: A: by bus. B: by bike. C: in cars. D: in boats.
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D

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I'm taking a test and have to guess the right answer to the question after the article. Article: From our smartphones to our latest weaponry, the technology that underpins modern life would be impossible without rare earth metals. The importance of rare earths has only grown as emerging markets increase their demand for technologies made with it, as does the renewable energy industry. The 17 metallic elements are common in the earth-s crust, but the technique used to extract and refine them is labor-intensive, environmentally hazardous and increasingly costly. Thomas Gradael, a professor of geology and geophysics at the Yale School of Forestry Environmental Studies, explains that thecriticality" of rare earths was only recently understood after China, which dominates the world-s supply of the minerals, cut exports by 40% in 2010, citing concerns over how polluting the rare earth industry was. Along with colleagues at Yale, Gradael decided to investigate the metals used in modern technologies to determine if there were viable substitutes."Twenty or thirty years ago electronics were being made with 11 different elements," explains Gradael. "Today's computers and smartphones use something like 63 different elements." Their findings showed that there were no "readily apparent" substitutes for a metal that would not compromise on quality or performance. However increased mining for these scarce resources can have some nasty side effects for the environment. China, which has intensively mined for rare earths with little regulation, allowing it to dominate the global industry since 1990, has acknowledged the incredible environmental harm caused by the process. "Excessive rare earth mining has resulted in landslides, clogged rivers, environmental pollution emergencies and even major accidents and disasters, causing great damage to people's safety and health and the ecological environment," read a white paper issued by the Chinese cabinet in June last year. Recycling metal has been advocated by some as a possible way of managing these precious resources-the European Parliament adopted a law curbing dumping... Question: Rare earths are growingly important in that Options: A: they exist in small numbers B: they are essential in modern technologies C: life would be impossible without them D: new technology markets are emerging
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B