49. If the project ______ by the end of this year is delayed, the construction company will be fined.　　 A. to be completed　　 B. is completed　　 C. being completed　　 D. completed 　

48. Mary came to France in 1940, and it wasn’t long ______ she became a French citizen.

　　 A. while　　　　 B. before　　　　 C. since　　　　 D. when　

47. The time he has devoted in the past ten years _______ the disable is now considered _______ of great value.

　　 A. to help, being　 B. to helping, to be　 C. to help, to be　　 D. helping, being　

46. I’m looking for a house---- nice, bright, quiet and ______ with a big garden.

　　 A. above all　　 B. after all　　　 C. at all　　　 D. in all　　

45. The theory he had stuck _____ to be true.

　　 A. proved　　 B. to proving　　 C. to prove　　 D. to proved　　

44. In my opinion, all Mr. White _____ good to his students in his class at present. He is very strict in their study.

　　 A. does does does　　 B. does do do　　 C. does does do　　 D. did do does　　

43. _____ the house Mr. Zhang has been broken into?

　　 A. When was it that　　 B. When　　 C. Has　　 D. Had　　　

42. The suit fitted him well _____ the colour was a little brighter.　

　　 A. except for　　 B. except that　　 C. except when　　 D. besides　　

41. The research is so designed that once _____ nothing can be done to change it.

　　 A. begins　　 B. having begun　　 C. beginning　　 D. begun　　

40. We have been looking at houses but haven’t found _____ we like yet.

　　 A. one　　 B. ones　　 C. it　　 D. them