4. When did he invent this thing?(变为被动语态)

When _________ ____________ _____________ ____________ ?

3. They finished the work at seven yesterday.(变为被动语态)

The work ________ _______________ at seven yesterday.

2. They saw a cup. It had three legs. (改同义句)

　　 They saw a cup ________ ________ ________.

1. They must be dinosaurs’ eggs, _________ _________? (反义疑问句)

5. This kind of machines ate used to cutting paper　　　　　 　　　　　　　　　

4. This sweater was bought me by my uncle last year. 　　 　　　　　　　　　

3. I have something important to be done.　　　　　　　　　　　　 　　　　　　　　　

2. Miss Gao is often listened in class. 　　　　　　　　　　　　　　　 　　　　　　　　　

1. The sick men are often looked by the nurse.