王迈迈英语

　　D) They can accumulate more group experience there.

　　
Passage TWO
 Questions 16 to 20 are based on the following passage.

　　Exercise is one of the few factors with a positive role in long-term maintenance of body weight.Unfortunately, that message has not gotten through to the average American, who would rather try switching to "light" beer and low-calorie bread than increase physical exertion. The Centers for Disease Control, for example, found that fewer than one-fourth of overweight adults who were trying to shed pounds said they were combining exercise with their diet.

　　In rejecting exercise, some people may be discouraged too much by caloric-expenditure charts;for example, one would have to briskly walk three miles just to work off the 275 calories in one delicious Danish pastry (小甜饼). Even exercise professionals concede half a point here. "Exercise by itself is a very tough way to lose weight," says York Onnen, program director of the President's Council on Physical Fitness and Sports.

　　Still, exercise's supporting role in weight reduction is vital. A study at the Boston University Medical Center of overweight police officers and other public employees confirmed that those who dieted without exercise regained almost all their old weight, while those who worked exercise into their daily routine maintained their new weight.

　　If you have been sedentary (极少活动的) and decide to start walking one mile a day, the added exercise could burn an extra 100 calories daily. In a year's time, assuming no increase in food intake, you could lose ten pounds. By increasing the distance of your walks gradually and 　making other dietary adjustments, you may lose even more weight.

　　16. What is said about the average American in the passage?

　　A) They usually ignore the effect of exercise on losing weight.

　　B) They prefer "light" beer and low-calorie bread to other drinks and food.

　　C) They know the factors that play a positive role in keeping down body weight.

　　D) They tend to exaggerate the healthful effect of "light" beer.

　　17. Some people dislike exercise because

　　A) they find it hard to exercise while on a diet

　　B) they don't think it possible to walk 3 miles every day

　　C) they think it is physically exhausting

　　D) they find consulting caloric-expenditure charts troublesome

　　18. "Even exercise professionals concede half a point here" (Line 3, Para. 2) means "They

　　A) are not fully convinced that dieting can help maintain one's new weight

　　B) agree that the calories in a small piece of pastry can be difficult to work off by exercise

　　C) are not sufficiently informed of the positive role of exercise in losing weight

　　D) partially believe diet plays a supporting role in weight reduction

　　19. What was confirmed by the Boston University Medical Center's study?

　　A) Weight reduction is impossible without exercise.

　　B) Even occasional exercise can help reduce weight.

　　C) Controlling one's calorie intake is more important than doing exercise.

　　D) One could lose ten pounds in a year's time if there's no increase in food intake.

　　20. What is the author's purpose in writing this article?

　　A) To stress the importance of maintaining proper weight.

　　B) To support the statement made by York Onnen.

　　D) To show the most effective way to lose weight.

　　D) To justify the study of the Boston University Medical Center.

　　
Passage THREE

　　Questions 21 to 25 are based on the following passage.

　　Scratchy throats, stuffy noses and body aches all spell misery, but being able to tell if the cause is a cold orflu ( ~,~ ) may make a difference in how long the misery lasts.

　　The American Lung Association (ALA) has issued new guidelines on combating colds and the flu(流感), and one of the keys is being able to quickly tell the two apart. That's because the prescription drugs available for the flu need to be taken soon after the illness sets in. As for colds, the sooner aperson starts taking over-the-counter remedy, the sooner relief will come.

　　The common cold and the flu are both caused by viruses. More than 200 viruses can cause cold symptoms, while the flu is caused by three viruses - flu A, B and C. There is no cure for eitherillness, but the flu can be prevented by the flu vaccine ( ~-~ ), which is, for most people, the bestway to fight the flu, according to the ALA.

　　But if the flu does strike, quick action can help. Although the flu and common cold have manysimilarities, there are some obvious signs to look for.

　　Cold symptoms such as stuffy nose, runny nose and scratchy throat typically develop gradually, and adults and teens often do not get a fever. On the other hand, fever is one of the characteristic features of the flu for all ages. And in general, flu symptoms including fever and chills, s