Question

—Did they clean the house yesterday afternoon?

—______. They cleaned it this morning.

1. A.
   No, they don’t
2. B.
   Yes, they did
3. C.
   No, they didn’t
4. D.
   Yes, they do

Answer 1

C

这题考查一般过去时的一般疑问句的否定回答。肯定回答是：Yes，I did.否定回答是：No， I didn’t. 所以选C。