用所给动词的适当形式填空。

1. The boy _____ (open) his eyes for a moment, _____ (look) at his mother and then _____ (smile).

2. I _____ (not know) you were in Paris.

3. I_____ (visit) your school before.

4. He _____ (keep) this book for two days.

5. They _____ (know)each other since childhood.

6. _____ Li Ming _____ (study) English this morning?

7. My uncle in London _____ (send) a birthday present to me yesterday.

8. When _____ (be) his sister born?

9. He _____ (live) in his hometown since he left here.

10. He _____ (go) to see his grandfather last Sunday.