Most of us lead unhealthy lives; we spend far too much sitting down. If in addition we are careless about our diets, our bodies soon bee loose and fatty and our systems slowmoving. There are some aspects(方面) of our unhealthy lives that we cannot avoid. I am thinking of such features of modern city life as pollution, noise, rushed meals and stress. But keeping fit is a way to reduce the effects of these evils. The usual suggestion to a person who is looking for a way to keep fit is to take up some sport or other. While it is true that every weekend you will find people playing football and hockey in the local park, they are outnumbered a hundred to one by the people who are simply watching them.
For those who do not particularly enjoy petitive sports — and it is especially difficult to do so if you are not good at them — there are such separate activities as cycling, walking, jogging and swimming. What often happens though is that you do them in such a leisurely way, so slowly, that it is doubtful if you are doing yourself much good, except for the fact that you have at least managed to get up out of your armchair.
Even after you have found a way for keeping in shape, through sport or gymnastics, you are still only half way to good health, because, according to the experts, you must also master the art of plete mental and physical relaxation(放松). It has to do with deep breathing, emptying your mind of all thoughts, meditation, and so on. Yoga, as practiced in the West, is the most widely known and popular of the systems for achieving the necessary state of relaxation. It seems ironical (讽刺性的), though, that as our lives have improved in a material sense we have found it increasingly necessary to go back to forms of activityphysical effort on the one hand and relaxation on the other — which were the natural way of life of our forefathers.
12. Pollution, noise and stress are examples of .
A. causes of unfitness
B. bad features of living in towns
C. the things we can pletely do away with
D. unavoidable things in town
13. We don’t get much out of separate sports because we .
A. don’t do them very often
B. don’t do them actively enough
C. find it hard to get out of our armchairs
D. don’t find them interesting
14. To be healthy we must .
A. keep fit and active B. keep fit and learn to relax
C. be active and practise Yoga D. have a sound mind
15. Our forefathers were healthy because .
A. their way of life closely connected with both exercise and relaxation
B. they were careful to get plenty of fresh air
C. they spent most of the time out of doors
D. their environment was not polluted12---15 BBBA
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(答案→)12---15 BBBA
解析：本文为说明文，介绍了身心健康的两个方面：积极锻炼和心态放松。
12.B 细节理解题。根据There are some aspects of our unhealthy lives that we cannot avoid. I am thinking of such features of modern city life as pollution, noise, rushed meals and stress. 可知pollution, noise, stress是生活在城市一些不健康的、不太好的方面。
13.B 推断判断题。根据What often happens though is that you do them in such a leisurely way, so slowly... 可知，我们锻炼的时候并不是太积极和投入，故效果不太理想。
14.B 推断判断题。根据you must also master the art of plete mental and physical relaxation等处可知，光是锻炼是不够的，还要注意心理保健。健康包括生理的和心理的（锻炼和心理放松）两个方面。故B项最佳。
15.A 推断判断题。根据physical effort on the one hand and relaxation on the other — which were the natural way of life of our forefathers.可知，我们祖先的生活方式很健康，是因为他们的生活方式与锻炼和放松密切相关。