20. Soldiers and residents ____ _____ the dyke against the flood.

　　　 A. took a turn; watch　　　　　　　　　 B. took turn; to watch　　　　　

C. took the turn; watching　　 　 D. took turns; to watch

19. Are you all teacher from middle schools? Yes, ______.

　　　 A. we all used to be 　　　　　　 B. we used to be all　　　　　　　 C. we all are　　　　　 D.　 we are all

18. Mr. Cassalt was much experienced about this work. I know, but the question is ____ he will stick to the work. 　　 A. that　　 　　 B. whether　　　　　　 C. if　　　　　　　 D. what

17. If you won’ t do it ____.

A. neither I will　　　　 B. nor won’t I　　　　 C. no more will I　　　　　　　　 D. either will I

16. Every teacher and every student ___ on the playground, shouting in anger. They were

protesting America’s aggressing Yugoslavia.　 A. was　　　 B. were C. has been　 D. have been

15. ____ you are wearing so many clothes today? I have caught a bad cold.

　　　 A. How about　　　　 B. What about　　　　 C. How come　　　　 D. How comes

14. After many ears of hard work, he finally turned ____.

　　　 A. a qualified teacher　　　　　　 B. so qualified a teacher　　　　

　　　 C. qualified teacher　　　　　　　　　　 D. such a qualified teacher

13. ___ used to be thought that the earth was square.　 A. It 　　 B. That　　 C. What　 D. How

12. It’s time that you ____ home and I’d rather you _____ again tomorrow.

　　　 A. are going; will come　　　　 B. go; are coming　　　　　

C. went; would come　　　　　　 D. would go; would come

11. The teacher suggested that the homework ____ in class.

　　　 A. be not done　　　　　　　 B. not be done　　　　　　　 C. was not done　　　　　　 D. were not done