题干
选择合适的选项补全对话。(每个选项只能选一次)
A. It's on the second floor.
B. Yes, it is.
C. No, it's the first floor
John: Excuse me．Is it the second floor?
Tom:____
John: Is that the teachers' office?
Tom:____
John: Where is the library?
Tom:____
John: OK．Thanks．
答案(点此获取答案解析）
C,B,A
