给下列句子选择恰当的答语。⑴Where is classroom 4？     A．It's next to the art room.
⑵This is my school.           B．Yes，it is.
⑶Is this the teachers' office?  C．It's so beautiful!
⑷Do you have a library?      D．Yes，we do.
⑸Where is the gym?          E．Classroom 4 is under the art room.