问题补充：
---Is there a library in your school? --- .
A. Yes, it is.
B. No, it isn’t.
C. Yes, there is.
D. No, there aren’t.
答案：
A. Yes, it is.
B. No, it isn’t.
(答案→)C. Yes, there is.
D. No, there aren’t.
解析：句意：你学校有一个图书馆吗？是的，有。there be 句型的回答，都用there be 结构构成，故选C
