单项选择题
[听力原文] M: This blue pencil is 50 cents and that black one is 10 cents more. W: The yellow one is twice as much as the black one.
A.60 cents. B.100 cents. C.120 cents. D.240 cents.
A.Monday. B.Tuesday. C.Wednesday. D.Thursday.
A.Boss and secretary. B.Husband and wife. C.Customer and receptionist. D.Teacher and student.