听力原文:W: I want to post this package.M: It feels like some books in this package.W: It
听力原文:W: I want to post this package.
M: It feels like some books in this package.
W: It is.
M: In that ease, it can go book rate. That's much cheaper.
W: Thank you very much.
What is the possible relationship between the speakers?
A.Salesman and customer.
B.Post office clerk and customer.
C.Teacher and student.
D.Railway station clerk and passenger.