lt, they do not only look younger and slimmer, but feel better. Because of increased physi

lt, they do not only look younger and slimmer, but feel better. Because of increased physical fitness, life expectance in the nation has risen to seventy-three years, with fewer people suffering from heart disease, the nation's number one killer.
Jogging ( 慢跑 ), the easiest and cheapest way of improving the body, keeps over 30million people of all ages on the run. For the price of a good pair of running shoes, anyone anywhere can join the race.
Dieting, too, has become a national pastime. Promoters of diets that eliminate eating one thing or another, such as fats or carbohydrates ( 碳水化合物 ), promise as much as 20- pound weight losses within two weeks. Books describing such amazing diets always head up ( 居……之首 )the best-seller lists because people who are overweight want to lose weight quickly and easily.
Nevertheless, jogging and dieting, carried to extremes, can be harmful. Many confused joggers overdo and finally suffer from ankle and foot damage. Dieting, fortunately, becomes only a temporary means for shedding a few pounds while the body lose the balanced nutrition ( 营养 )it requires, so most dieters cannot keep on diets. Above all, common sense should be the keystone for any dieting and exercise plan.
6.The main idea of this passage is that .
A. both jogging and dieting can improve your health
B. exercise and improved diet has raised the American's life expectance
C. people, who jog and diet wisely, will be healthier than those who do not
D. diet and exercise harm rather than benefit health
7.According to the passage, which of the following statements is TRUE?
A. Jogging can damage the body because it is too tough an exercise.
B. Diets are so popular because they are on the best-seller lists.
C. Americans now live to be 73years old.
D. Exercise and diet are more widespread in America than ever before.
8.It is implied but not stated that .
A. heart disease is the number one killer among Americans
B. exercise and dieting bring about spiritual as well as physical well-being
C. people don't stay on a diet because it doesn't work
D. a 20-pound weight loss within two weeks is too much for the body
9. The best title for this passage is .
A. Jogging and Diet B .Exercise and Health
C. Physical Fitness D. Life Expectancy and Diet 6---9 CDBC

(答案→)6---9 CDBC 解析：本文讲的是节食与运动。6.C. 主旨大意题。慢跑和节食能使身体健康 , 但不注意方法 , 过分进行慢跑和节食 , 会带来身体损伤。在短文结尾句中明确提出 :( 慢跑和节食的 ) 某些常识很关键。7.D. 推理判断题。根据第一、二段内容可看出 在美国慢跑和节食比以往任何时候都要流行。8.B. 推理推断题。根据短文的 they do not only look younger and slimmer, but feel better.一句可推断出答案。 A 项内容是短文中已明确表示出来了 , 不符题意。9.C. 主旨大意题。这四个选项都有一定的干扰性 ,A 项纯解说这两项运动 ;B 、D 项没有包括锻炼、节食两项内容 , 不全面。 C 项表示 身体健康 , 短文就是围绕这一主题进行阐述的。

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