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. Where does this conversation take place?
A. In a bank. B. In a hotel. C. In a post office.
2. Why is the air fresher than before?
A. There are fewer cars in the city.
B. There are more plants in the city.
C. There is a green belt around the city.
