用所给词的适当形式填空。

1. You          (can) try to do it.

2. He spent one hour            (do) his homework.

3. I saw her      (play) when I was eight.

4. She became a         _ (skate) champion when she was ten.

5. He is a great     __   (piano).

6.  What can I do           (become) famous?

7. How old were you when you started          (learn) English?

8. He          (win) the first prize last year.

9. Yao Ming is an            (usual) basketball player.