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.

It is the _________(nation) flag of China.

Yesterday, it was ______.（   ）

A．rainy

B．raining

C．A and B

—What's this ? (   )
—It's a tiger. It's   .

A．big

B．a big

You should be _____（help）.