Question

--________ you free this evening?

--No, I have much work to do this evening.

1. A.
   Do
2. B.
   Is
3. C.
   Are
4. D.
   Will

Answer 1

C
此题很多同学根据时间状语this evening判断为一般将来时，故会误选D。为什么选D不对呢?因为此题题眼为free，它是形容词，故前面应用be动词搭配，意为“有空”。