完形填空 Sports and games are good 1 our health. They can 2 us strong, stop us from getting 3 fat and keep 4 and happy. Especially(特别是),they can help the people who work with their brains (大脑) 5 of the day to study better, for sports and games let people 6 their body. They make our life richer and more colorful. If we 7 not have a strong body, we can 8 do things well.  So persons of all ages enjoy 9 and taking part in 10 kinds of sports track and field(田径) , swimming, skateboarding and ball games. (     )1. A. at (     )2. A. make (     )3. A. to (     )4. A. health (     )5. A. all (     )6. A. exercises (     )7. A. are (     )8. A. always (     )9. A. seeing (     )10. A. difference B. for B. find B. too B. healthy B. most B. to exercise B. do B. hard B. watching B. different C. to C. do C. a lot of C. unhealthy C. some C. exercising C. don't C. hardly C. to watch C. difficult D. with D. help D. two D. healthily D. any D. exercise D. aren't D. sometimes D. looking D. difficulty