55. She will tell us why she feels so strongly that each of us has a role _____ in making the earth a better place to live.

　 A. to have played　 B. to play　 C. to be played　 D. to be playing

54. He gave me this strange object for my birthday and I don’t know _______ .

　 A. it what to do with　 B. what to do it with　

　 C. what to do with it　 D. to do what with it

53. Little Jim should love _____ to the theatre this evening .

　 A. to be taken　 B. to take　 C. being taken　 D. taking

52. We agreed ______ here but so far she hasn’t tuened up yet .

　 A. having met　 B. meeting　 C. to meet　　 D. to have met

51. In some parts of London , missing a bus means ______ for another hour .

　 A.waiting　 B.to wait　　 C. wait　 D. to be waiting

50. ----You were brave enough to raise objections at the meeting.

　 ----Well,now I regret ____ that.

　 A.to do　 B.to be doing　 C.to have done　 D.having done

49.----The light in the office is still on.

　 ----Oh,I forgot ____ .

A.　　 turning it off　 B.turn it off　 C.to turn it off　 D.having turned it off

48.The chair looks rather hard,but in fact it is very comfortable to ____ .

　 A.sit　 B.sit on　 C.be sit　 D.be sit on

47.Wang Tao was made ____ the dishes for a week as punishment.

A.　　 to wash　 B.washing　 C.wash　 D.to be washing

46. The perpose of new technoiogies is to make life easier,_____ it more difficult.

A.　　 not make　 B. not to make　 C.not making　 D.do not make