57. His plan was such a good one _________we all agreed to accept it. ( 06 陕西)

A. so　 　　　　　　 B. and　　 　　　　 C. that　　　　　　 　　　　 D. as

56. How can you expect to learn anything ____ you never listen? ( 06山东 )

A. in case　　　　　 　　B. even if　　　　 　　C. unless　　　　　　　 　　D. when

55. We’re just trying to teach a point ____ both sides will sit down together and talk. ( 06 山东)

A. where　　　　　　　　　 B. that　　　　　　　　　 C. when　　　　　　　　　　　 D. which

54. 　　　　　he has limited technical knowledge, the old worker has a lot of experience. ( 06全国I )

A. Since　　　　　 B. Unless　　　　 C. As　　　　　　　　 D. Although

53. He was about halfway through his meal 　　　　　a familiar voice came to his ears. ( 06辽宁 )

A. why 　　　　　　　　　 B. where　　　　　　　 C. when　 　　　　　　　　　 D. while

52. ______ environmental damage is done, it takes many years for the ecosystem (生态系统) to recover.(06江苏)

A. Even if　　　　　 B. If only　　　　 C. While　　　　　　 D. Once

51. I had just stepped out of the bathroom and was busily drying myself with a towel ____ I heard the steps.

(06湖南)　 A. while　　　　　　　　　 B. when　　　　 C. since　　　　　　 D. after

50. "You can't have this football back 　　　　　you promise not to kick it at my cat again," the old man said firmly.　 (06广东)　

A. because　　　　 B. since　　　　　 C. when　　　　　 D. until

49. Jenny was very sad over the loss of the photos she had shot at Canada, 　　　　　this was a memory she especially treasured.　 (06广东)

　 A. as　　　　　　　 B. if　　　　　　 C. when　　　　　 D. where

48. --- How long do you think it will be _________ China sends a manned spaceship to the moon?

　 --- Perhaps two or three years.　 (06福建)

A. when　　　　　　 　　 B. until　　　　　　　　　 C. that　　　　　　　　　 D. before