第一节 听下面5段对话。每段对话后有一个小题，从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。听完每段对话后，你都有lo秒钟的时间来回答有关小题和阅读下一小题。每段对话仅读一遍。 What is the population of that city

A． Manager and clerk.
B． Director and secretary.
C． Professor and student.

A．they have no other choice
B．they think they can get the container for free
C．the container is too attractive
D．they believe the cost of the container is included in the cost of the product