第二节：语法填空（共10小题，每小题1.5分，满分15分）Exercise is good for you, but most people really know very li

第二节：语法填空（共10小题，每小题1.5分，满分15分）
Exercise is good for you, but most people really know very little about 31 to exercise properly. So when you try, you 32 run into trouble.
Many people believe that when specific muscles are exercised, the fat in the neighbouring area is “burned up”. Yet the truth is 33 exercise burns fat from all over the body.
Studies show muscles which are not exercised lose their strength very quickly. To regain it 34 (need) 48-72 hours and exercise every other day will keep a normal level of physical strength.
To lose weight you should always “work up a good sweat” when 35 (exercise). Sweating only reduces body temperature to prevent heating. This is nothing 36 water loss.
Walking is the best and easy-to-do exercise. 37 helps the circulation of blood throughout the body, and has a direct effect 38 your overall feeling of health. Experience says that 20 minutes’ exercise 39 day is minimum amount. But if your breathing doesn’t return to normal state within minutes 40 you finish exercising, you’ve done too much.31. how 32. may/can/will 33. that 34. needs 35. exercising 36. but 37. It 38. on 39. a/per 40. after

(答案→)31. how 32. may/can/will 33. that 34. needs 35. exercising 36. but 37. It 38. on 39. a/per 40. after 解析：可联系答.案.网客服索取。

就是这个解释