19. Time passed quickly and three months went by ___ we knew it.　

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

18. ____ the Emperor cared for was nothing but new clothes.

　　　 A. What 　　　　　　　　　　 B. That　　　　　　　　　 C. Which　　　　　　　 D. Who

17. Have you found your umbrella ____ you left it? A. at which　　　 B. where C which D. that

16. ____ that strike will be ended is unknown.　　 A. When B. That　　　　 C. X　　　　　　　 D. What

15. It won’t be long ___ the man gets back. A. after 　　　　 B. soon　 C. before　　　　 D. ago

14. He never came except ____ he was in trouble. 　　 A. that 　 B. what　 C. when　　　　 D. for

13. Do you know ____ to Shanghai by train the day after tomorrow?

　　　 A. that if she will go 　　 B. if she goes　 C. if she will go　 D. if or not she will go

12. It was in 1976 ___ he came here.　　 A. that　　 B. when　　　　 C. which　　　　 D. then

11. ____ he comes, we won’t be able to go. A. Without　　 B. Unless C. Except　　 D. Even

10. __ he won’t come, so we decide to go without him.　　　 A. Seeing that B. For C. Now that D. X