单选题
Exercise is good for people, but most people really know very little about how to exercise properly. So when you try, you may run into trouble. Many people【C1】______that when specific muscles are exercised, the fat in the neighbouring area is "burned up". Yet the【C2】______is that exercise burns fat from all over the body. Studies show muscles which are not【C3】______lose their strength very quickly. To regain it needs 48 to 72 hours and exercise every other day will keep a normal level of physical strength. To【C4】______weight you should always "work up a good sweat" when exercising. No sweating only【C5】______body temperature to prevent over heating. This is nothing but water loss. 【C6】______you replace the liquid, you replace the weight. Walking is the best and easy-to-do exercise. It helps the circulation of blood throughout the body, and has a direct【C7】______on your overall feeling of health. Experience says that 20 minutes' exercise a day is minimum amount. 【C8】______your breathing doesn't return to normal state within minutes after you finish【C9】______. you've done【C10】______.