1. 根据句意，用when或while填空。

1. （1） Jenny was cooking in the kitchen at 5:00 this afternoon you called her.
3. （2） the two boys were arguing, the teacher arrived.
5. （3） She was listening to an English program her parents were watching TV.
7. （4） I told them the funny story, they all laughed.
9. （5） What were you doing he came in?