4. 　　　　　　　(caution)not to be late again,he decided to change himself.

3. Heat causes the　　　　　　　 (expand)of gases.

2. Her marriage has been　　　　　　　 (approve)of.

1. The red flags on the city tower are　　　　　　 (flutter)in the wind.

3. Britain　　　　　 the U.S. in the War of Independence.

2. They　　　　　 the cause commmunism.

1. They are　　　　 　oppression.

3. Egypt is well-known　　　　　　 its pyramids.

C. fight for/fight with/fight against

2. The use of gunpowder was known 　　　　　　　the Chinese before the Europeans.

A. do with/deal with

They didn’t know　　　　　　　 the naughty boy.

B. as/for/to

1. His brother is well-known 　　　　a play writer.