A、  B、  C、  C

Do you know where the conference will be?
(A) No, I’m speaking at it.
(B) I’m not sure if I’m going.
(C) Yes, it’ll be in Hong Kong in April.

How did you hear about our company?
(A) Yes, write it down.
(B) We’re having a party.
(C) I saw your ad in the paper.