完形填空Keeping yourself fit and doing more exercise can give yo

完形填空
Keeping yourself fit and doing more exercise can give you better health. However not many students realize(意识到) the importance of good__ 31___ and they don't have enough exercise.
Students are___32__ young to know the necessity（必要性） of__ 33___ good health. They may think they are now healthy__34___ because they need not see a doctor. __35___ this only means that they are not ill. It doesn't mean they are healthy _ 36____ physically(身体上) fit.
Exercise will not__37___ too much time. The key is to have regular exercise. One should do it every day. For example, fifteen minutes' jogging(慢跑) a day can__38___ you very fit. Doing exercise with friends can be very__39___ and relaxing. Playing__40___ games such as tennis, football and basketball ect. not only__41____ you the chance of exercising your body, but it can__42___ be a way to make more friends and help to improve leadership qualities.
Do not hesitate(犹豫) and __43___.not wait anymore.There must__44___ a certain kind of game or exercise for you to choose. Try one and you will find__45___ interesting and rewarding(值得做的) it will be.
( )31. A.vegetables B.food C.money D.health
( )32. A.so B.very C.too D.such
( )33. A.keeping B.making C.buying D.taking
( )34. A.much B.enough C.many D.too
( )35. A. And B. But C. Since D. Or
( )36. A.as B.when C.if D.or
( )37. A.spend B.pay C.cost D.waste
( )38. A.keep B.help C.let D.give
( )39. A.interest B.interests C.interesting D.interested
( )40. A.word B.ball C.song D.chess
( )41. A.gives B.stops C.buys D.likes
( )42. A.always B.often C.sometimes D.also
( )43. A.did B.does C.is D.do
( )44. A.be B.have C.will D.like
( )45. A.what B.how C.when D.why