用所给单词的适当形式填空。

1. I think she__________(be) an excellent writer in the future.

2. What_________ you _________( do) at 9:00 a. m. yesterday?

3. While it__________(snow) heavily, she went out.

4. The plane usually _________ (leave) the airport at seven o'clock in the morning.

5. Look! The boys _________( play)  football over there.

6. When I was walking on the road last night, someone________(follow) me.

7. He was __________(surprise) at the ____(surprise) thing,

8. I________( see) a big black dog when_________(come) in.

9. Someone___________( shout) at the poor old man at eight yesterday evening.

10. What ___________( happen) while Linda was on the telephone?