10. --Look！Who is running on the playground?

―It       be Mr. Yang. He exercises every morning.

9. ―I just found a basketball under the chair. Whose is it?

It        be Jack's. He likes playing basketball.

8. -—Whose birthday cake is this?

It       belong to Ann. She is the only one who ordered a birthday cake.

(   ) 11. My uncle has to wear a        and a tie to work.

A. clothes    B. uniform C. jeans    D. suit

7. --Is the English book yours,Han Mei?

一Let me see. Oh,yes,it          be mine. Ixok!My English name is on it.

 用must,can't,could或might完成下列句子。

6. --Look！Mr. Li is coming.

—He       be Mr. Li. I h、is in Beijing for a meeting now.

5. Look!八dog is      (追）after a rabbit.

4. What do you think the      (不明飞行物）is?

3. Mr. King often wears a grey      (西装）.

2. At last the plane      (降落）on the land safely.