A. Forty students.

B. No, it isn't.

C. Yes, we do.

D. It's on the second floor.

【1】Do you have a library?（________）

【2】Is that the computer room?（________）

【3】Where's the teachers' office? （________）

【4】How many students are there in your class?（________）

【答案】

【1】C

【2】B

【3】D

【4】A

【解析】

略