2.______in the queue for half an hour, Tom suddenly realized that he had left his wallet at home. (2004北京)

A. To wait　　　 B. Have waited　　　 C. Having waited　　　　 D. To have waited

1. My advisor encouraged______ a summer course to improve my writing skills. (2004北京)

A. for me taking　　　 B. me taking　　　　 C. for me to take　　 D. me to take

42. Site will tell us why she feels so strongly that each of us has a role______ in making the earth a better place to live. (2003上海春招)

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

(2004年共考查39个题)

41. Unless______ to speak, you should remain silent at the conference. (2003上海春招)

　　　 A. invited 　　 B. inviting 　　C. being invited 　D. having invited

40. ______the meeting himself gave them a great deal of encouragement.

　　　 A. The president will attend 　　B. The president to attend

　　　 C. The president attended 　　　 D. The president's attending

39. Friendship is like money: easier made than ____. (2003上海春招)

　　　 A. kept 　　　 B. to be kept 　C. keeping 　　D. being kept

38. Don't be discouraged. ______ things as they are and you will enjoy every day of your life. (2003上海春招)

　　　 A. Taking 　　 B. To take 　　 C. Take 　　　 D. Taken

37. The man we followed suddenly stopped and looked as if _______ whether he was going in the right direction. (2003北京春招)

　　　 A. seeing 　　 B. having seen 　 C. to have seen 　D. to see

36. The manager,______ his factory's products were poor in quality, decided to give his workers further training. (2003北京春招)

　　　 A. knowing 　　B. known 　　 C. to know 　　D. being known

35. --Why did you go back to the shop? (2003北京春招)

　　　　　　 　 --I left my friend______ there.

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