一、听力理解（20小题，每小题１分，共20分）
第一节
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答案，并将其标号填入题前括号内。每段对话读两遍。
( )1. How does the man reuse the water after washing clothes?
A. By using the water to clean the floor. B. By using the water to wash cars.
C. By using the water to water plants.
( )2. Why doesn’t Li Ming want to stay there?
