17. We didn’t know _____, so we gave it to the police.

　 A. whose wallet it is　 B. whose wallet was it

　 C. whose wallet this is　 D. whose wallet it was

16. It’s a nice day. Why _____ out for a walk?

　 A. don’t go　 B. not going　 C. didn’t go　 D. not go

15. ----Have you done _____ homework?　 ----Yes, I have.

　 A. today’s　 B. today　 C. todays’　 D. todays

14. _______ the math problem is difficult, I’ll try very hard to work it out.

　 A. Though　 B. When　 C. Before　 D. After

13. He walked _____ fast for us _____ catch up with.

　 A. so; that　 B. such; that　 C. enough; to　 D. too; to

12. I want to know _____.

　 A. what is his name　 B. what’s his name

　 C. that his name is　　 D. what his name is

11. _____ children shouldn’t be allowed to drive because they are not serious enough at that age.

　 A. Sixteen years old　 B. Sixteen year olds　

C. Sixteen-years-old　 D. Sixteen-year-old

10. I have ever ____ the Great Wall twice. It is an _____ place.

　 A. been to; excited　 B. gone to; exciting　

C. been; exciting　 D. gone to; excited

9. ----Could you tell me ______?　　 ---- Sorry, I don’t know.

　 A. when does the train arrive　 B. when the train arrives

　 C. when arrives the train　 D. the train when arrives

8. The next morning, Dink wasn’t sure _____ the light was real or just a bad dream.

　 A. that　 B. when　 C. whether　 D. what