6. The teapot is used to keep the tea warm. (改为主动句)

　We ________ ________ ________ ________ keep the tea warm.

5. This orphan is taken care of by an old lady. (改一般疑问句)

　________ this orphan ________ care of by an old lady?

4. This kind of paper is made of wood. (就划线部分提问)

　________ ________ this kind of paper ________ ________?

3. One of the classroom is often cleaned. (改为否定句)

　One of the classroom ________ often ________ ________.

2. We use a recorder in our English class. (改为被动语态)

　________ ________ ________ ________ in our English class ________ ________.

A)句型转换(每空一词，缩写算一词)

1. People use stamps for sending letters. (改为被动语态)

　________ ________ ________ for sending letters ________ ________.

20. Lily sings best _______ these girls.

　A. in　　　　 B. between　　　 C. among　　　 D. with

19. My sister, with my friends, _______ playing pingpang now.

　A. is　　　 B. are　　　　 C. was　　　　 D. were

18. What’s this _______ English? It’s fridge.

　A. for　　 B. in　　 C. at　　 D. with

17. Remember _______ the door. I’ve lost the key _______ the lock.

　A. not to lock, for　　　 B. not to lock, to

　C. not locking, to　　　 D. not locking, of