问题
选择题
—Did they clean the house yesterday afternoon?
—______. They cleaned it this morning.
A．No, they don’t
B．Yes, they did
C．No, they didn’t
D．Yes, they do
答案
答案：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。