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. When will Paul and Susan leave?
A. Next Monday. B. They haven’t decided yet. C. Next Tuesday.
2. Why did John fail to go to the party yesterday evening?
A. He had to work. B. He caught a cold. C. He had to study.
