动词填空。

1. Can he _____ (sing) Beijing Opera? Yes, he can.

2. Look! The cats _____ (climb) the tree.

3. Uncle Jim is busy today. He _____ (not come) to our party.

4. Peter _____ (live) two floors below Mary.

5. The thief tried _____ (run) away but the policemen _____ (catch) them in the end.

6. Go to the bookshop in the shopping mall, and you _____ (find) a lot of postcards there.

7. Is it difficult _____ (finish) _____ (work) out the problem in five minutes?

8. One frog like this has enough poison _____ (kill) about 2,200 people.