51. Simon thought his computer was broken 　　　　his little brother pointed out that he had forgotten to turn it on.　　　　　　　　　 　　　　　　　(Beijing 05 spring)

A. until　　　　　　 B. unless　　　　 C. after　　　　 　D. because

50. It is almost five years　 　　　　　we saw each other last time. (Beijing 05 spring)

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

49. I’d like to arrive 20 minutes early _______ I can have time for a cup of tea.

A. as soon as　　　 　B. as a result　　 C. in case　　　 D. so that (Beijing 2005)

48. That was really a splendid evening. It’s years 　　　I enjoyed myself so much.

A. when　　　　　　 B. that　　　　　 C. before　　　 　D. since　　 (Anhui 2005)

47. You must keep on working in the evening,　　 　you are sure you can finish the task

in time

A. as　　　　　　　 B. if　　　　　　 C. when　　　　 　D. unless　 (Anhui 2005)

46. The more I think about him, the more reasons I find for loving him ____ I did.

　 A. as much as 　　　B. as long as 　 　　C. as soon as 　D. as far as (Hunan 2005)

45. Allow children the space to voice their opinions, ____ they are different from your own.

A. until　　　 　　　 B. even if　　　 　 C. unless　 　　 D. as though (Hunan 2005)

44. He transplanted the little tree to the garden ____ it was the best time for it.

　 A. where 　　　 　　　B. when　 　　　 C. that 　　　 　　　D. until (Shanghai2005)

43. He tried his best to solve the problem,____ difficult it was.　　 (Tianjin 2005)

　 A. however　　 　　　 B. no matter　　　 C. whatever　 D. although

42. I always take something to read when I go to the doctor’s __________ I have to wait.

　 A. in case　　　 B. so that　　 C. in order　　 D. as if　 (NMET2005-3)