为下列句子选择合适的应答语，把序号写在相应的括号里。

() 1. Do you have a music room?

() 2. How many students are there in your class?

() 3. Where is the teachers' office?

() 4. Your bedroom is so nice!

() 5. Is the library next to Classroom 1?

A. It's on the second floor.

B. No, it isn't.

C. Yes, we do.

D. Thank you.

E. Forty-eight.