4. To talk with your mouth full is bad manners.

　　　　　　　　 　　　　　　　　　bad manners to talk with your mouth full.

3. We haven’t heard from her for seven years.

It is seven years 　　　　　we last heard from her.

It is for seven years 　　　　we haven’t heard from her.

2. Since you have understood it so well, there is no need to explain it again.

Since you have understood it so well, 　　　　　is not 　　　　to explain it again.

1. How old is the man who is standing by the gate?

How old is the man 　　　　　　　　　the gate？

5. As the boy 　　　　　(play) the drums, he　　　 　(begin) to feel sick.

4. By the time we 　　　　　(get) back, he 　　(complete) the oil painting.

3. While Zhao Jie 　　　　(watch) a quick show, his parents came in.

2. I want to go to the cinema tomorrow.　 I think I 　　　　　(ask) Li Kang to come with me.

1. When they arrived I　　　 (read) a newspaper, I put it down and said hello to them.

3. The merchant(商人)　　　　 　us with milk.