Exercise is good for you, but most people really know very little about how to exercise properly. 1 when you try, you can runsintostrouble. Many people 2 that when specific muscles are exercised, the fat in the neighbouring area is“3 up”. Yet the 4 is that exercise burns fat from all over 5. Studies show muscles which are not 6 lose their strength very quickly.To regain it needs 48 to 72 hours and exercise every other day will 7 a normal level of physical strength. To 8 weight you should always“work up a good sweat”when exercising. 9 sweating only 10 body temperature to prevent over heating.This is 11 water loss. 12 You replace the liquid, you replace the 13. Walking is the best and easy-to-do exercise.It helps the circulation of blood 14 the body, and has a direct 15 on your overall feeling of health.Experience says that 20 minutes' 16 17 is minimun amount. 18 your breathing doesn't return to normal state within minutes after you finish 19, you've done 20.

1.A.While B.When C.As D.So

2.A.understand B.believe C.hope D.know

3.A.built B.burned C.piled D.grown

4.A.reply B.possiblility C.truth D.reason

5.A.arm B.leg C.stomach D.body

6.A.exercised B.examined C.protected D.cured

7.A.lose B.raise C.burn D.keep

8.A.lose B.gain C.keep D.burn

9.A.Certainly B.No C.Fortunately D.Probably

10.A.raises B.reduces C.destroys D.keeps up

11.A.how B.why C.nothing but D.more than

12.A.While B.Once C.As D.Whenever

13.A.weight B.muscle C.sweat D.strength

14.A.over B.around C.throughout D.with

15.A.effect B.use C.usage D.affect

16.A.education B.sleep C.exercise D.rest

17.A.one day B.a day C.everyday D.someday

18.A.But if B.But C.If D.And if

19.A.working B.walking C.exercising D.breathing

20.A.enough B.much C.too much D.much too

答案及解析：

1. D。因?yàn)榇蟛糠秩瞬恢�道如何正確鍛煉，所以，人們在訓(xùn)煉時(shí)常會(huì)遇到麻煩。句中you表示泛指�！　�

2. C。 “希望“鄰近的脂肪消耗掉，在此符合語境；understand，know不合邏輯，因?yàn)�，即已”明白“，就不�?huì)不符合事實(shí)真相；believe表示的是人的得一種看法，而看法有對有錯(cuò)。

3. B。 下一句中再現(xiàn)了burn這一詞�！　�

4. C。 truth本意為“真理”，此處引申為“事實(shí)”--指實(shí)際鍛煉時(shí)脂肪消耗的情形。余者不合文意�！　�

5. D。 余者不能概全　　

6. A。 根據(jù)常識可知，“不鍛煉的肌肉會(huì)很快喪失力量。　　

7. D。 根據(jù)前一句“要重新獲得力量需要48到72個(gè)小時(shí)可知，每隔一天鍛煉一次可保持正常水平的體力�！� 　　

8. A。 本句意思是“為了--體重，人們應(yīng)該通過鍛煉來出汗”�？崭裉庯@然應(yīng)該是“減少”。而不是“增加”或”“保持”，更不可能是“燃燒”�！　�

9. B。 表示對該節(jié)首句看法的否定。首句看法的錯(cuò)誤性可從下文推知。

10. B。 根據(jù)to prevent over heating可知，sweating的作用是降低體溫�！　�

11. C。 loss是名詞，故前面不能填連接副詞how和why；more than“不只是”，不合文意。本題應(yīng)選nothing but，全句的意思為“這(即sweating)只是人體內(nèi)水分的消耗”�！　�

12. B。 意思是“一旦”，引起時(shí)間狀語從句，余者不合文意。　　

13. A。 由To lose weight you should…可推知，余者不在本節(jié)論及范圍之內(nèi)�！　�

14. C。 throughout the body遍及全身。余者不合文意�！　�

15. A。 have effect on“對……產(chǎn)生影響”，合乎文意，合乎搭配�！　�

16. C。 本節(jié)主要講的是鍛煉形式之一--散步。另從最后一節(jié)中也能得到暗示�！　�

17. B。 根據(jù)常識和語境可知，“每天”(而不是某一天)至少得散步20分鐘。另everyday是形容詞，不能作狀語�！　�

18. A。 與上一句中minimum amount形成對比，if引導(dǎo)條件句�！　�

19. C。本節(jié)是上一節(jié)內(nèi)容的繼續(xù)，論述的仍是“鍛煉”。walking不能概括全面，應(yīng)舍去�！　�

20. C。指出原因--“(運(yùn)動(dòng))過量”。enough，much表意不清，much too后應(yīng)接其它詞。