8. Do you know which is the _____________ (dangerous) mountain to climb ?

7. Let’s see who is the best ______________ (climb) .

6. Don’t give up ! We’ve done it many _____________ (time) .

5. By the time the police arrived, the robber had _________(appear).

4. It is still not ___________ (know) who first reached the top of the mountain .

3. He found it hard to drive on a ___________ (mist) morning .

2. It’s an important meeting. Try ___________ (be) on time .

1. My grandmother loves ________________ (plant) flowers .

15. The things talked about in this report ___ over a year ago .

　A. had taken place　 B. took place　 C. have taken place　

　D. were taken place

14. The teacher got angry ___ what the boy had done .

　A. because of　 B. because　 C. though　 D. if