Question

--May we take the books out?

--________.

1. A.
   No, you may not
2. B.
   No, you can not
3. C.
   No, you can't
4. D.
   Please don't

Answer 1

C
以may, can, must, need等情感动词开头的一般疑问句，在否定答语中需用情态动词+not的缩写形式。