17. The terrible earthquake d__________ most of the buildings within 20 minutes.

15. The time bomb e__________ but nobody was injured.

16 The __________(历史的)place of interest receives millions of tourists every year.

14. It’s good to get back to __________(文明)after living in a tent in the remote area for two years.

13.Seven found the r_________of building buried under he sand,together with a lot of treasures.

11.Who is the first one to have d__________ the continent of America?

12When giving a talk, you’re supposed to explain the why you are talking to the __________(观众) at the beginning.

10.With so many things r__________ to be settled,the manager feel worried.

9.Things __________ (逐渐)improved.

8.The old government was o　　 and a new one replaced it.

7.What parents do has a great i　　 on their children.

6.I have used the computer for nearly five years,but it is still in good c　　.