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  3. Exercise is one of the few factors with a positive role in long-term maintenance of body weight. Unfortunately, that message has

Exercise is one of the few factors with a positive role in long-term maintenance of body weight. Unfortunately, that message has

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问题     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.
What is said about the average American in the passage?
选项 A、They tend to exaggerate the healthful effect of "light" beer
B、They usually ignore the effect of exercise on losing weight
C、They prefer "light" beer and low-calorie bread to other drinks and food
D、They know the factors that play a positive role in keeping down body weight
答案B
解析 在第一段中提到“that message has not gotten through to the average American，who wouldrather try switching to“light”beer and low—calorie bread than increase physical exertion”。这里的that message(那信息)肯定应该在前一句，也就是“Exercise is one of the few factors with a positive role in long—term maintenance ofbody weight”(锻炼是对长期保持体重起积极作用的少有因素之一)。词组“has not gotten through to”指的是“在……中并不流行”．这里的意思就是那一信息对于一般美国人来说并没有受到重视。who引导了一个从句，是对一般美国人的描述。这里使用了would rather…than(宁可，也不)句型，意思是美国人宁可把兴趣投向淡爽啤酒和低卡路里面包，也不增加身体锻炼。四个选项中，B符合文意。
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