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10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。
When does the next train to Hangzhou leave

[A] They are experienced advisory writers.
B. They are experts.
C. They are knowledgeable people.

[A] Because he would leave for another city that day.
B. Because he had to meet his friend that day.
C. Because he had to see a doctor that day.