18. How many more decades will have to pass( )scientists succeed in providing a cure for cancer?
A. when
B. before
C. since
D. until
19. The engineer is not happy with the project, and( )is her boss.
A. neither
B. so
C. Wither
D. as
20. ( )for a long time, but he tried his best to catch up with his classmates.
A. Having been ill
B. Being ill
C. Tough he was ill
D. He was ill
21. How close parents are to their children( )a strong influence on the development of the children's character.
A. have
B. has
C. having
D. had
22. He changed his name,( )that nobody would find out what he had done before.
A. having thought
B. to think
C. thinks
D. thinking
23. There is so much work( )today. Would you be kind enough to lend me a hand?
A. having done
B. to be done
C. being done
D. will be done
24. By no means( )to move to a new place far away from her workplace, because it isn't convenient for her family and herself.
A. Jane will agree
B. will Jane agree
C. Jane will disagree
D. will Jane disagree
25. You can,( )the sky is clear, see as far as the old temple on top of the mountain, but not today.
A. when
B. where
C. though
D. because
点击查看更多成人英语三级考试真题