9．
阅读理解
June 5th is World Environment Day. This
makes us pay more attention to our environment. When Wang Boxuan, a Beijing
high school student, uses up his exercise books, he does not throw them away.
Each one is kept at his school with hundreds of exercise books that are given
by other students. Then they are sold to a Beijing paper-making factory.
The paper is recycled and used again by
students and teachers in the school. At the same time, the money that is made
from the sales goes to schools in Inner Mongolia(内蒙古). The government there uses the money to plant more
trees and grass. This place is one of the sources(源头)of
the sandstorms(沙尘暴)that often attack Beijing during
springtime.
Wang's school is one of the schools in the
capital that take part in the \"green promise" environmental
protection activity. So far, nearly210，000 students have taken part in the activity, collecting more than
87 tons of waste paper.
