49．Don’t leave the water______ while you brush your teeth.　　　　　　　　 (Tianjin2004)

　 A run　　　　　 B running　　 C being run　　 D to run

48. He looked around and caught a man _______ his hand into the pocket of a passenger.

　　 A. put　　　　 B. to be putting　 C. to put　　 　 D. putting　 (Beijing2004春)

47. Linda worked for the Minnesota Manufacturing and Mining Company, ____ as 3M.

A. knowing　　　　 B. known　　　　　 C. being known 　　D. to be known(Zhejiang2004)

46. _____ in the queue for half an hour, Tom suddenly realized that he had left his wallet at home.　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 (Beijing 2004) 　A. To wait　　　　 B. Have waited　　 C. Having waited　 D. To have waited

45. My advisor encouraged _____ a summer course to improve my writing skills.(Beijing 2004) 　　 A. for me taking　　 B. me taking　 　C. for me to take　 D. me to take

44. Alice returned from the manager's office, ________ me that the boss wanted to see me at once. A. having told　 B. tells　　 C. to tell 　　　　D .telling 　　(NMET2004-4)

43. It shames me to say it, but I told a lie when ______at the meeting by my boss (2004-4)

A. questioning　　　　　　　　　　　 B. having questioned 　

C. questioned　　　　　　　　　　　　 D. to be questioned

42. Reading is an experience quite different from watching TV; there are pictures _____ in your mind instead of before your eyes.　　　　　　　　　　　　　　　　 (NMET2004-3)

A. to form　　　　　 B. form　　　　　 C. forming　　　　 D. having formed

41. Helen had to shout _____ above the sound of the music.　　　　　　　 (NMET2004-3) 　 A. making herself hear　　　　　　　 B. to make herself hear

C. making herself heard　　　　　　　 D. to make herself heard

39. When first ______to the market, these products enjoyed great success.(NMET2004-2) 　　 A. introducing　　 B. introduced　　 C. introduce　　　 D. being introduced 40.　 "We can' t go out in this weather," said Bob,______ out of the window.(NMET2004-2) 　 A. looking 　　　　B. to look　　　　 C. looked 　　　　　D. having looked