[originaltext]Most of the books in this library are very old, aren’t they?(A)

Most of the books in this library are very old, aren’t they?
(A) I don’t go to the library very often.
(B) Yes, it was built in 1976.
(C) I suppose we can’t afford to buy new books.

Aren’t you supposed to be at the board meeting?
(A) Yes, it’s in the conference room.
(B) No, I have to finish writing this article.
(C) Down the hall, the third door on the right.