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

45.When I handed the report to John,he said that George was the person _____ .

　 A.to send　 B.for sending　 C.to send it to　 D.for sending it to

44.She can’t help ____ the house because she’s busy making a cake.

　 A.to clean　 B.cleaning　 C.cleaned　 D.being cleaned

43.　 I will lend you the book ____ I can remember who has borrowed it.

A.　　 if only　 B.only if　 C.even of　 as of

42. ----______ we move the picture over there?Do you think it’ll look better?

　 -----I can’t agree with you more.

A.　　 What you think　 B.What if　 C.evev if　 D.Only if