Section A
Directions: This section is to test your ability to understand short dialogues. There are 5 recorded dialogues in it. After each dialogue, there is a recorded question. The dialogues and the questions will be spoken only once. When you hear a question, you should decide on the correct answer from the 4 choices A , B, C, and D.
听力原文：M: It's all right this time. You don't have to buy two new tickets today. But next time, please be sure you are on the right train.
W: We will read the signs more carefully next time. Thank you.
Q: What is the probable relationship between the two speakers？
(1)

A. Conductor and passenger.
B. Teacher and student.
C. Salesman and customer.
D. Boss and secretary.