选择合适的句子补全对话。

A. How do you have computer classes? B. It's so beautiful. C. What was your school like five years ago? D. Tell me about your school, please. E. Do you have computers?

A:Welcome to our school.

B:Wow!   

A:There is a small building in my school.

B: 

A:Yes, we do. But there aren't many.

B: 

A:Several of us share a computer when we have computer classes.

B: 

A:I don't know.  I didn't go to school until I was nine years old.