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  3. Ninety percent of Americans know that most of their compatriots are overweight, but just 40 percent believe themselves to be too

Ninety percent of Americans know that most of their compatriots are overweight, but just 40 percent believe themselves to be too

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问题     Ninety percent of Americans know that most of their compatriots are overweight, but just 40 percent believe themselves to be too fat. Government【B1】______ show that more than 60 percent of the U.S. population is overweight, and half is obese, meaning they are at serious【B2】______ of health effects from their weight. But the Pew Research Center telephone survey of more than 2,000 adults finds that many people【B3】______ how tall they are and underestimate how much they weigh—and thus do not rate themselves as overweight, even when they are. The survey finds that most Americans, including those who say they are overweight, agree that personal behavior—rather than【B4】______ disposition or marketing by food companies—is the main reason people are overweight. In【B5】______, the public says that a failure to get enough exercise is the most important reason, followed by a【B6】______ of willpower about what to eat. About half the public also says that the kinds of foods inarketed at restaurants and【B7】______ stores are a very important cause, and【B8】______ a third says the same about the effect of genetics and heredity. And at least some people appear to have given up on dieting to control their weight.【B9】______, and 52 percent say they have dieted at some point in their lives. In a poll taken 15 years ago, 【B10】______. Those surveyed agree that maintaining a healthy weight is important.【B11】______
【B8】
选项
答案roughly
解析 该句主干部分的成分都是完整的，句首需填入一个程度副词修饰a third，很有可能为“大概”之义。
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