*Question*
I'm taking a test and have to guess the right answer to the question after the article. Article: Solar water heaters can use energy from the sun to heat water. They are used around the world. The solar water heater is based on a design developed some years ago in Afghanistan. Since then, it has been built and used in many countries. It can heat seventy liters of water to 60degC. It can do this between sunrise and noon on a clear day with an average temperature of 32degC. There are two parts of the solar water heater. One part, the collector, is made of a metal plate painted black. This metal surface, placed in contact with the water, will heat the water. Black-painted surfaces that receive the sun's heat become hotter than those of any other color1. Metal plates that have raised parts on the surface work better than those without them. Once the water is heated, it is kept hot with special material, which allows the water to stay warm for a long time. The second part of the solar water heater holds the water for the system. This water tank can hold about one hundred liters of water. Two rubber pipes are connected to the water tank. One pipe lets water go into the system. The other lets water go out. When the water heater is working correctly, water will flow from the tank to the collector and back again. You can use the hot water at the top of the tank for washing and cleaning. This solar water heater is easy to build and operate. It will last about two years before the rubber pipes need to be replaced. Question: The color1 of the collector is black because _ . Options: A: it is the cheapest color1 paint B: it can be found easily in daily life C: it can take in more energy than other color1s D: it is good for protecting the metal surface
**Answer**
C

*Question*
I'm taking a test and have to guess the right answer to the question after the article. Article: There is no doubt that for a long time college education has been accepted. All high school graduates ought to go, says conventional wisdom and statistical evidence, because college will help them earn more money, become "better" people, and learn to be more responsible citizens than those who don't go. But college has never been able to work its magic for everyone. And now that close to half our high school graduates are attending, those who don't fit the pattern are becoming more numerous, and more obvious. College graduates are selling shoes and driving taxis; college students interfere(;) with each other's experiments and write false letters of recommendation in the fierce competition so as to get admitted into graduate schools. Others find no stimulation in their studies, and consequently have to drop out, which is often encouraged by college administrators. Some observers say the fault is with the young people themselves--they are spoiled and they are expecting too much. But that's a condemnation of the students as a whole, and doesn't explain all campus unhappiness. Others blame the state of the world, and they are partly right. We have been told that young people have to go to college because our economy can't absorb an army of untrained eighteen-year-olds. But disappointed graduates are learning that it can no longer absorb an army of trained twenty-two-year-olds,either. Question: Who contributes to campus unhappiness? Options: A: young students who are all spoiled and expecting too much. B: our society that can't offer enough jobs to college graduates. C: young people as well as our society are to blame for all this. D: our society that has not enough jobs for high school graduates.
**Answer**
C

*Question*
I'm taking a test and have to guess the right answer to the question after the article. Article: What you see is what you eat, according to the latest study to confirm that watching TV encourages children to eat more junk food. But the researchers say there may be an easy way to stop unhealthy snacking in front of the television: put healthier food within easy reach. Leah Lipsky and Ronal Iannotti are the scientists who worked on the study, which was reported this week in the Archives of Pediatrics & Adolescent Medicine. The report says that for every hour of television children watch, they are 8% less likely to eat fruit every day, 18% more likely to eat candy, and 16% more likely to eat fast food. The reasons for the link between watching TV and eating junk food aren't surprising: young people watching TV are exposed to more advertising for unhealthy food-such as fast food-than commercials for fresh fruit and vegetables. Studies show that children who watch a lot of TV are more likely to prefer eating things that are high in sugar, salt and fat, even when they aren't watching TV. The researchers also found that some children who snacked in front of the television, however, increased the amount of fruit that they ate. It all depended on what was available and within reach. " _ ," says Lipsky. "But it suggests that if you have other choices available-and don't have the unhealthy choices available-then children might be encouraged to eat more fruit." Lipsky and Iannotti also recommend that parents _ the amount of time that children spend in front of a TV or computer-no more than two hours a day for children over two years old. Question: According to the passage, we can infer the author believes _ . Options: A: nothing can stop children eating junk food B: watching less TV can help children eat less junk food C: children can stop eating junk food by themselves D: the report is untrue
**Answer**
B

*Question*
I'm taking a test and have to guess the right answer to the question after the article. Article: Millions of sports lovers are still thinking about one thing----the Winter Olympics in Sochi Russia. Close to 2900 men and women competed in the 2014 Winter Games about a month ago. The Olympics brought a lot of attention to Sochi, a city on the Black Sea, which is a popular area for vacation travelers. The area is known for its mild winters. At least $50 billion was spent on the 2014 Winter Games, making it the costliest Olympics in history. Seven billion dollars was spent on the 2010 Winter Games in Vancouver, Canada. Olympic officials chose Sochi to host the 2014 games almost seven years ago. At that time, Russian President Vladimir Putin said the games would cost about $13 billion. Yet the actual expenses exceeded his estimate. So where did all the money go? Some observers say the high cost is partly the result of security measures. Brian Jenkins, a terrorism expert from the RAND Corporation, gave the following explanation. There were anywhere between 70,000 and 100, 000 policemen and military troops deployed around the city. The main threat came from separatist and Islamist groups from the North Caucasus, especially from Chechnya and Dagestan. One group claimed responsibility for two suicide bombings in Volgograd last December. The attacks killed more than 30 people. The city is only about 600 kilometers away from Sochi. Bruce Hoffman is a terrorism expert from Georgetown University in Washington DC. He says the increased security made Sochi a difficult target for terrorists. It is thought that the terrorists' intention was to make life difficult for the Russians and to create some sort of incident that would take away the enjoyment. The last Olympians from around the world on Russian soil were in 1980. That was a year after Soviet troops invaded Afghanistan. More than sixty countries didn't take part in the Moscow Summer Games to show their anger. Question: It can be known from the passage that Bruce Hoffman was _ Options: A: a terrorism expert from the USA B: the writer who wrote this article C: an athlete who competed in Sochi D: a terrorism expert from RAND Corporation
**Answer**
A