1.______________ is the library?
It's _______ the second floor.
A. What, in B. Where, on C. What , on
2.Is this the teachers' office? ________________
A.Yes, is it. B. No, it is. C. Yes, it is. D. Yes, it isn't.
3.Do you have a library? ______________________
A. Yes, we don't. B. No, we do. C. Yes, we do.