单选题{{I}}Questions 22 - 25 are based on the following dialogue.{{/I}}

单选题WhenisBobgoinghomethisafternoon?

单选题What has happened?

单选题 {{I}}Questions 15 to 18 are based on the conversation you have just heard.{{/I}}

单选题

单选题According to the author, the situations of American families in the future may______.

单选题In his research, Gerald Wilde finds that technological advances and increases in safety standards have ______.

单选题There was one thought that air pollution affected only the area immediately around large cities with factories and heavy automobile traffic. At present, we realize that although these are the areas with the worst air pollution, the problem is literally worldwide. On several occasions over the past decade, a heavy cloud of air pollution has covered the east of the United States and brought health warnings in rural areas away from any major concentration of manufacturing and automobile traffic. In fact, the very climate of the entire earth may be infected by air pollution. Some scientists consider that the increasing concentration of carbon dioxide in the air resulting from the burning of fossil fuels (coal and oil)is creating a "greenhouse effect" —conserving heat reflected from the earth and raising the world"s average temperature. If this view is correct and the world"s temperature is raised only a few degrees, much of the polar ice cap will melt and cities such as New York, Boston, Miami, and New Orleans will be in water. Another view, less widely held, is that increasing particular matter in the atmosphere is blocking sunlight and lowering the earth"s temperature—a result that would be equally disastrous. A drop of just a few degrees could create something close to a new ice age, and would make agriculture difficult or impossible in many of our top farming areas. Today we do not know for sure that either of these conditions will happen (though one recent government report drafted by experts in the field concluded that the greenhouse effect is very possible). Perhaps, if we are lucky enough, the two tendencies will offset each other and the world"s temperature will stay about the same as it is now. Driven by economic profit, people neglect the damage on our environment caused by the "advanced civilization". Maybe the air pollution is the price the human beings have to pay for their development. But is it really worthwhile?

单选题The car was repaired but not quite to my______. [A] joy [B] pleasure [C] attraction [D] satisfaction

单选题The art market is a window on the thoughts of the very rich. In November, 1994, Bill Gates, founder of the Microsoft computer empire, spent 30.8 million dollars on a 72 - page manuscript written and illustrated by the left hand of Leonardo da Vinci. Leonardo was not just one of the greatest artist of the Renaissance. He was also a farseeing scientist whose mind leaps ahead of his time. The manuscript, which contains Leonardo' s thoughts on the nature of water and on universe, was the only one of his 65 surviving manuscripts that was held in the United States. Six months later, Andrew Lloyd Webber, creator of a series of international hit musicals and a very wealthy man, spent 29.2 million dollars on Picasso' s portrait. It was the highest price paid at auction for a painting since the art market crashed in 1990. The Leonardo and the Picasso were the two highest prices of the 1994 - 1995 auction season. The very rich have got their confidence back, which has meant that buyers can be found for works of high quality. The nature of the market is changing. In 1980s, art was bought as a speculation: buy in April, sell for double the price in September. This attitude disappeared with the 1990 depression, but the very rich and their financial advisors think that it is wise to keep a percentage of your investment in art works of really outstanding quality. Besides Europe and America, there is now a growing market in the East. Indeed, the East has become the great hope of the dealers over the last three years--they have been aiming to find new buyers in Japan, Hong Kong, Korea, Singapore, Taiwan and China. There are more rich connoisseurs in Japan than anywhere else, who have the best understanding of arts', but they have not been in buying mood. Japanese speculators lost huge amounts of money in the 1990s crash and there are few collectors who dare to buy any works of art today.

单选题Winter holiday makers in the mountains come face to face with death because______.

单选题{{I}} Questions 14 ～ 17 are based on a talk as to eating out.{{/I}}

单选题Judging from recent surveys, most experts in sleep behavior agree that there is virtually an epidemic of sleepiness in the nation. "I can't think of a single study that hasn't found Americans getting less sleep than they ought to," says Dr David. Even people who think they are sleeping enough would probably be better off with more rest. The beginning of our sleep-deficit crisis can be traced to the invention of the light bulb a century ago. From diary entries and other personal accounts from the 18th and 19th centuries, sleep scientists have reached the conclusion that the average person used to sleep about 9.5 hours a night. "The best sleep habits once were forced on us, when we had nothing to do in the evening down on the farm, and it was dark. " By the 1950s and 1960s, that sleep schedule had been reduced dramatically, to between 7.5 and 8 hours, and most people had to wake to an alarm clock. "People cheat on their sleep, and they don't even realize they're doing it," says Dr David. "They think they're okay because they can get by on 6.5 hours, when they really need 7.5,8 hours or even more to feel ideally vigorous. " Perhaps the most merciless robber of sleep, researchers say, is the complexity of the day. When ever pressures from work, family, friends and community mount, many people consider sleep the least expensive item on his programme. "In our society, you're considered dynamic if you say you only need 5.5 hours' sleep. If you've got to get 8. 5 hours, people think you lack drive and ambition. " To determine the consequences of sleep deficit, researchers have put subjects through a set of psychological and performance tests requiring them, for instance, to add columns of numbers or recall a passage read to them only minutes earlier. "We've found that if you're in sleep deficit, performance suffers," says Dr David. "Short-term memory is weakened, as are abilities to make decisions and to concentrate. /

单选题WhyisLauraattheshop?