一、根据句意，用括号内所给词的适当形式填空。

1. She sees a film ________ (one) a month.

2. Tom was ________ (illness) yesterday, so he didn't go to school.

3. Doing exercise can help us stay ________ (health).

4. Li Hua had a ________ (quickly) breakfast and then went to work.

5. Don't ________ (worried) about your English. I can help you.