题目内容：

1.When I saw him, he _________ (wait) for the bus.

2.What _______ you ________ (do) at that time last week?

3. Look, what ______ they _______(do) in the park?

4.I saw him ________(play) in the park just now.

5.The cat ________(lie) under the desk when you passed.

6. While the boy _________(watch) TV, his cat jumped down from the table.

7. My friend __________(go) to the museum if it ______(be) fine tomorrow.

8. Did you find it difficult _________(do) it?

9. Liu Xiang _______(win) the gold medal at the 2004 Olympics.

10. Beijing _________ (make) host to the 2008 Olympics