单项选择题
A.How do you do? B.Hi,Linda.This is Burt. C.Glad to hear your voice. D.Fine,that's good.
A.Wow,it is great!Thank you. B.You shouldn't have bought it. C.It must be very expensive. D.That's good.How much is it?
A.Is that all? B.I'm free now. C.It's a pleasure to help D.How should I do it?