20. _____ by thick bamboo and high forest, the ancient city hadn’t been discovered until the 1990s.

　 A. Surrounding　 B. Surround　 C. Surrounded　 D. Having surrounded

19. I wonder how much ________.　

A. does the watch cost　 B. did the watch cost　 C. the watch costed　 D. the watch costs

18. ________ is no reason for dismissing her.　

A. Because she was a few minutes late　 　　　　　　 B. Owing to a few minutes late　

C. The fact that she was a few minutes late 　　　　　　　 D. Being a few minutes late

17. He lives in ______was once called “Holly Land”.

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

16. The problem is _____ will go.

A. that　　 B. that who　　 C. who　　 D. whoever

15. _______makes mistakes must correct them.

A. Those who　 B. Anyone　 C. Whoever　 D. No matter who

14. When and why he came here ______ known yet.

A. is not　 B. are not　 C. has not　 D. have not

13. He asked me ________ with me.

A. what is the trouble　 　　　　　　　　　　 B. what wrong was

C. what was the matter　 　　　　　　　　　 D. what trouble it is

12. It is generally considered unwise to give a child ____ he or she wants.

A. however　 B. whatever　 C. whichever　 D. whenever

11. ______really concerned her was that her own son lacked too many hours of sleep every day.

　 A. Which　 B. Why　 C. That　 D. What