选择合适句子完成对话

A. There is our school. B. Is there a gym? C. How many classrooms are there? D. Is there a zoo? E. What's in your school?

A :
B: Wow, it's a good school.
A: There are many classrooms.
B:  
A: There are 48 classrooms.
B:
A: Yes, there is a big gym.
B:
A: No, there isn't.