In the United States, 30 percent of the adult population has a "weight problem". To many people, the【B1】______is obvious: they e

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问题     In the United States, 30 percent of the adult population has a "weight problem". To many people, the【B1】______is obvious: they eat too much. But scientific evidence does little to【B2】______this idea. Going back to the America of the 1910s, we find that people were【B3】______than today, yet they ate more food. In those days, people worked harder【B4】______, walked more, used【B5】______much less and didn’t watch television.
    Several modern studies, moreover, have shown that fatter people do not eat more on the【B6】______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【B7】______that slim people are more【B8】______than fat people. A study by a research group at Stanford University School of Medicine found the following【B9】______facts: The more the men ran, the more body fat they lost. The more they ran, the greater amount of food they ate.
    Thus, those who ran the most ate the most, yet【B10】______the greatest amount of body fat.
Word Bank
A. thinner B. number
C. average D. lost
E. interesting F. support
G physically H. mentally
I. active J. observed
K. show L. machines
M. polite N. manners
O. cause
【B10】

选项

答案D

解析
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