Q: Read the following article and select the best answer. Article: If two scientists at Los Alamos National Laboratory are correct, people will still be driving gasoline powered cars 50 years from now, giving out heat-trapping carbon dioxide into the atmosphere--and yet that carbon dioxide will not contribute to global warming. In a proposal by two scientists, vehicle emissions would no longer contribute to global warming. The scientists, F. Jeffrey Martin and William L. Kubic Jr., are proposing a concept, which they have named Green Freedom, for removing carbon dioxide from the air and turning it back into gasoline. The idea is simple. Air would be blown over a liquid solution of potassium carbonate, which would absorb the carbon dioxide. The carbon dioxide would then be put to chemical reactions that would turn it into fuel : gasoline or jet fuel. This process could change carbon dioxide from an unwanted, climate-changing pollutant into a vast resource for renewable fuels. The cycle--equal amounts of carbon dioxide produced and removed--would mean that cars, trucks and airplanes using the synthetic fuels would no longer be contributing to global warming. Although they have not yet built a synthetic fuel factory, or even a small model, the scientists say it is all based on existing technology. "Everything in the concept has been built, is operating or has a close cousin that is operating." Dr. Martin said. The Los Alamos proposal does not go against any laws of physics, and other scientists who have independently suggested similar ideas. Dr. Martin said he and Dr. Kubic had worked out their concept in more detail than former proposals. There is, however, a major fact that explains why no one has built a carbon-dioxide-to-gasoline factory: it requires a great deal of energy. According to their analysis, their concept, which would cost about $5 billion to build, could produce gasoline at an operating cost of $1.40 a gallon and would turn economically practical when the price at the pump hits $4.60 a gallon. Other scientists said the Los Alamos proposal perhaps looked... Question: What is the value of the scientists' proposal? - It increases the productivity of a fuel factory. - It decreases the cost of producing gasoline. - It reduces the pollution caused by car driving. - It promotes a new idea of environmental protection.
A: It reduces the pollution caused by car driving.

Q: Read the following article and select the best answer. Article: In modem society there is a great deal of argument about competition.Some value it highly,believing that it is responsible for social progress and prosperity.Others say that competition is bad, that it sets one person against another and that it leads to unfriendly relationship between people. I have taught many children who held the belief that their self-worth relied on how well they performed at tennis and other skills.For them,playing well and winning are often life-and-death affair. In their single-minded pursuit of success,the development of many other human qualities is sadly forgotten. However,while some seem to be lost in the desire to succeed,others take an opposite attitude.In a culture which values only the winner and pays no attention to the ordinary players,they strongly blame competition.Among _ are youngsters who have suffered under competitive pressures from their parents or society.Teaching these young people,I often observe in them a desire to fail.They seem to seek failure by not trying to win or achieve success .By not trying,they always have an excuse:"I may have lost,but it doesn't matter because I really didn't try.'' What is not usually admitted by themselves is the belief that if they had really tried and lost,that would mean a lot.Such a loss would be a measure of their worth. Clearly,this belief is the same as that of the true competitors who try to prove themselves.Both are based on the mistaken belief that one's self-respect relies on how well one performs in comparison with others.Both are afraid of not being valued.Only as this basic and often troublesome fear begins to dissolve can we discover a new meaning in competition. Question: What does this passage mainly talk about? - Competition helps to set up self-respect. - Opinions about competition are different among people. - Competition is harmful to personal quality development. - Failures are necessary experiences in competition.
A: Opinions about competition are different among people.

Q: Read the following article and select the best answer. Article: A small piece of fish each day may keep the heart doctor away. That's the finding of a study of Dutch men in which deaths from heart disease were more than 50 percent lower among those who consumed at least an ounce of salt water fish per day compared to those who never ate fish. The Dutch research is one of three human studies that give strong scientific support to the long held belief that eating fish can provide health benefits, particularly to the heart. Heart disease is the number-one killer in the United States, with more than 550,000deaths occurring from heart attacks each year. But previous research has shown that the level of heart disease is lower in cultures that consume more fish than Americans do. There are fewer heart disease deaths, for example, among the Eskimos of Greenland, who consume about 14 ounces of fish a day, and among the Japanese, whose daily fish consumption averages more than 3 ounces. For 20 years, the Dutch study followed 852 middle-aged men, 20 percent of whom ate no fish. At the start of the study, average fish consumption was about two-thirds of an ounce each day, with more men eating lean fish than fatty fish. During the next two decades, 78of the men died from heart disease , The fewest deaths were among the group who regularly ate fish, even at levels far lower than those of the Japanese of Eskimos, This _ was true regardless of other factors such as age, high blood pressure, or blood cholesterol levels. Question: The passage is mainly about _ . - the changes in people's diet - the daily fish consumption of people in different cultures. - the high death rate of disease in some countries. - the effect of fish eating on people's health
A: the effect of fish eating on people's health

Q: Read the following article and select the best answer. Article: Dear Sir, I have to travel every day from Souk Road to the airport. Two buses travel along their route : the number 49 and number 16. But by the time the number 16 bus reaches Souk Road it is always full, so I can't get on it. I have to wait for the number 49, because sometimes there are empty seats on it. The timetable says that there are buses from Souk Road to the airport every ten minutes. If this is so, why do I have to wait half an hour for a bus nearly every day? The regulations say that if there are empty seats on a bus, the bus must stop at every stop where people are waiting. Why do the half-empty buses go straight past me when I am standing at the bus stop? The regulations say that no bus may carry more than 40 seated passengers and 20 standing passengers. Yesterday I was the first to get off the bus when it reached the airport. I counted the other passengers as they got off. There were 129 of them. It is clear that our bus companies break the regulations and think little of their passengers. Can nothing be done to make your service better? Yours Tired passenger Question: The regulations say that each bus may carry _ passengers at most. - 20 - 40 - 60 - 129
A: 60