从方框中选择最佳选项完成对话, 有两项多余。

A. It can't be Andrew's. B. What's wrong with you? C. He could be running for exercise. D. It must be Andrew's. E. He looks worried. F. You must be joking. G. Let's go and ask him.

A: Whose soccer ball is this?

B:  He loves playing soccer.

A: Look! He is running to us.

B: Why do you think he is running?

A:  

B: I don't think so.

A: He might have some trouble.

B:  

A: Hi, Andrew.  

C: When I got home after exercise, I heard something strange in my house.

B: Let's ask policemen for help.