补全对话

A. It's so big! B. How many students are there in your class? C. Do you have a library? D. No, it isn't. E. Welcome to our school!

Chenjie: This is my classroom.

The visitor(来访者):

Chenjie: Forty-five students.

The visitor: Is that the computer room?

Chenjie: It's the teachers' office.

The visitor:

Chenjie: Yes, we do. It's on the second floor. This way, please.