57. How can you expect to improve your oral English if you never hear a word of it ____?

　　 A. spoken　　　　　 B. to be spoken　　 C. speaking　　　　 　D. speak

56. As ____ above, these changes are physical changes, not chemical ones.

　　 A. mentioning　　 　B. mentions　　　　 C. mentioned　　 　　D. to mention

55. ____ as I tell you to or else you’ll be sorry.

　　 A. Doing　　　　 　B. To do　　　　　 C. Done　　　　 　　　D. Do

54. ____ fit, we must take exercise every day, rain or shine.

　　 A. To keep　　　 　B. Keeping　　　　 C. Kept　　　　　 　　D. Keep

53.If ____, he is most likely to come to your reception.

　　 A. is invited　　　 B. invited　　　　　 C. inviting　　　 　　D. invites

52. _____ her inexperience, we decided to give her another chance.

　　 A. Considered　　 　B. Considering　　　 C. To consider　　 　D. Consider

51. Anyone ____to join in the competition must sign up before Friday.

　　 A. wishes　　　　 　B. wished　　　　　 C. wishing　　　　 　D. to wish

50. _____ to be one of the greatest inventions of the 20^th century, the computer is playing a more and more important role in social life.

　　 A. Considered　　 　B. Considering　　　 C. To consider　　 　D. Consider

49. ____ as a “walking dictionary”, he is able to help people with their English studies.

　　 A. Known　　　 　　B. To Know　　　　 　C. Knowing　　　 　　D. Know

48. On weekends the swimming pool is full of people ______to swim.

　　 A. learn　　　　　 　B. to learn　　　　 C. learning　　　 　D. are learning