第一节（共5小题：每小题1分，满分5分）
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。
1. What do we know about the man?
A. He did not see John.
B. He had a traffic accident.
C. He arrived home at 6 o' clock.
2. How many bills has the man received?
A. 5. B. 8. C. 20.
