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.
