四级完形填空模拟题大全21.doc.doc

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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 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 is 11 water loss. 12 You replace the liquid, you replace the 13 .
Walking is the best and easy-to-do helps the circulation of blood 14 the body, and has a direct 15 on your overall feeling of 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 .