A、  B、  C、  BShouldn’t you…?(不是应该做……吗?)否定疑问句→省略no的否定回答

Are you ready to order now, or do you need more time to decide?
(A)  I’ II be ready to go out in ten minutes.
(B)  Actually, could you recommend some dishes?
(C)  Yes, she will be back soon.

Shouldn’t you register for the annual conference today?
(A)  No, the gross income is higher than that.
(B)  The deadline is tomorrow.
(C)  The registration fee has increased this year.