第一节 (共5小题; 每小题1.5分, 满分7.5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 would Susan go to meet Professor Smith?
A. At 10:00. B. At 10:30. C. 11:00.
2. What are the two speakers talking about?
A. A surprising thing. B. A famous scientist. C. Nobel Prize.
3. What is the probable relationship between Mary and Lily?
A. Classmates. B. Close friends. C. Twin sisters.
