补全对话

A. They can play basketball, football and tennis there. B. Are they behind the dining hall too? C. It's in front of the dining hall. D. They are next to the offices. E. Where is the library?

A: Excuse me.

B: It's behind the dining hall.

A: Where are the classrooms?

B: No, they aren't.

A: And where is the gym?

B: There are many students in it.

A: What can they do in it?

B:

A: Thank you.

B: You're welcome.