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

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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 calori c-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 aday,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 was confirmed by the Boston University Medical Center’s study?(          )

选项 A、Controlling one’s calorie intake is more important than doing exercise
B、Even occasional exercise can help reduce weight
C、Weight reduction iS impossible without exercise
D、One could lose ten pounds in a year’s time if there’s no inerease in food intake

答案A

解析 文章提到身体健康测试是在第二段第一句话“Historically,most physical—fitness tests haveusually included measures of muscular strength and endurance,not for health-related reasons,but primarily becausesuch fitness components have been related to performance in athletics”,这个句子的基本结构是主句+not for(原因)+but(原因)。主句陈述了多数健康测试通常包含肌肉力量和耐力项目这个事实,从句给出了原因——首先澄清其原因与健康无关(not for health-related),而后指出主要原因(primarily because):这些健康因素(指肌肉力量和耐力项目)与运动水平相关。从这句话可以看出,人们参加健康测试与健康无关,可以排除B,而C和D文中都没提到。A所说的“how well they could do in athletics”与文中的“performance in athletics”意思是一样的,应该选A。
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