单选题
{{B}}Passage 1{{/B}}

In the United States, 30 percent of the adult population has a "weight problem." To many people, the cause is obvious: they eat too much. But scientific evidence does little to support this idea. Going back to the America of the 1910s, we find that people were thinner than today, yet they ate more food. In those days people worked harder physically, walked more, used machines much less and didn't watch television.
Several modern studies, moreover, have shown that fatter people do not eat more on average than thinner people. In fact, some investigations, such as the 1979 study of 3 545 London office workers, report that, on balance, fat people eat less than slimmer people.
Studies show that slim people are more active than fat people. A study by a research group at Stanford University School of Medicine found the following interesting facts:
The more the men ran, the more body fat they lost.
The more they ran, the greater amount of food they ate.
(76) {{U}}Thus, those who ran the most ate the most, yet lost the greatest amount of body fat.{{/U}}

单选题 The physical problem that many adult Americans have is that ______.

【正确答案】 C

【答案解析】本题考查的是考生对细节的把握。答案在第一段第一句话：In the United States, 30 percent of the adult population has a "weight problem." "在美国，30%的成年人都有体重问题。”因此许多美国成年人的身体问题是他们太胖了，C为正确答案。

单选题 According to the article, given 500 adult Americans, ______ people will have a "weight problem."

【正确答案】 D

【答案解析】本题考查的是考生对细节的把握。答案也在第一段第一句话：In the United States, 30 percent of the adult population has a "weight problem." "在美国，30%的成年人都有体重问题。”因此，如果有500成年人，那么150人就会有体重问题。D为正确答案。

单选题 Is there any scientific evidence to support that eating too much is the cause of a "weight problem?"

A、 Yes, there is plenty of evidence.
B、 Of course, there is some evidence to show this is true.
C、 There is hardly any scientific evidence to support this.
D、 We don't know because the information is not given.

【正确答案】 C

【答案解析】本题考查的是考生对细节的把握。答案在第一段第三句话：But scientific evidence does little to support this idea. “但是几乎没有任何科学依据能证明这一点。” C为正确答案。

单选题 In comparison with the adult American Population today, the Americans of the 1910s ______.

【正确答案】 A

【答案解析】本题考查的是考生对细节的把握。答案在第一段：Going back to the America of the 1910s, we find that people were thinner than today, yet they ate more food. In those days people worked harder physically, walked more, used machines much less and didn't watch television. “回顾1910—1919年的美国，我们发现人们比现代人瘦，可是他们吃得更多。在那个时代，人们体力工作更繁重，走路更多，较少使用机器也不看电视。”因此那时的人比现在吃得多，活动多。这句话符合题意，A为正确答案。

单选题 Modern scientific researches have reported to us that ______.

A、 fat people eat less food and are less active
B、 fat people eat more food than slim people and are more active
C、 fat people eat more food than slim people but are less active
D、 thin people run less, but have greater increase in food intake

【正确答案】 A

【答案解析】本题考查的是考生对细节的把握。答案在第二段和第三段：Several modern studies, moreover, have shown that fatter people do not eat more on average than thinner people. Studies show that slim people are more active than fat people. “而且，一些现代研究已经表明，胖人并不比瘦人平均吃得多。研究表明瘦人比胖人活动多。”因此，胖人吃得少，活动少。这句话符合题意。A为正确答案。