读句子，选择合适的答句。

() 1. Where is the art room?

() 2. Is it on the second floor?

() 3. How many students?

() 4. Is this your computer room?

() 5. Do you have an art room?

A. It's on the first floor.

B. Forty-five students.

C. No, it isn't.

D. Yes, it is my computer coom.

E. Yes, we do.