A、  B、  C、  C(A)中时态与问句不一致；(B)中“live”是对题干中leave的近音干扰；均需排除。

Let me pack it for you, Ms. Smith.
(A) Thanks a lot.
(B) I’m flattered.
(C) How much do you charge for the package?

Don’t leave me alone, will you?
(A) No, we didn’t.
(B) I want to live by myself.
(C) No, I won’t. I’ll be by your side.