A、  B、  C、  C确认事实的否定疑问句→同意

What would you like to have?
(A)  I would like to go swimming.
(B)  No, thanks. I’ ve had enough.
(C)  Chicken salad, please.

Wasn’ t our Personnel manager from Los Angeles?
(A)  I’m from Boston.
(B)  They are still deciding.
(C)  That’s what I heard.