第一节 听力理解（5段共15小题，每小题2分，满分30分）
每段播放两遍，各段后有几个小题，各段播放前每小题有5秒钟的时间，请根据各段播放内容及其相关小题，在5秒内从题中所给的A , B , C中，选出最佳选项。
听第一段对话，回答第1—3题。
1. What’s the most probable relationship between the two speakers?
A. Strangers B. Colleagues C. Old schoolmates
2. What did Tom do in Hong Kong?
A. He taught English at school B. He was a computer engineer. C. He worked as a salesman.
