5. Mary lives next to me. She is my n      

4. The concert will be hold o      if the weather is fine.

1. Mr. White is doing an experiment in the      

2. I think the      must be Carla's.

3. Victor felt      in class because he stayed up too late last night.

20. We enjoyed ourselves at the picnic last weekend.(改为同义句)
We_________ ________ at the picnic last weekend.

19. There are some boys who are playing on the playground.(改为同义句）
They are some boys      on the playground.

18. The woman outside the door must be Li Lin.(改为否定句)
The woman outside the door___________ ________ Li Lin.

17. That is David's wallet.(对画线部分提问）

       is that?

16. This dictionary must be Li Ying's.(改为同义句）

This dictionary must___________  ________ Li Ying.

(   ) 14. -What's behind the door?

--There must be a dog       behind it.

A. to sit    Ii sit C. sat    D. sitting

(   ) 15. Frank was late for school this morning because he didn't      the school bus.

A. check    B. clean C. catch    D. collect