高二英语Unit9[整理三套]课件
日期：2010-01-27 01:20
Reading
Welcome To
The Earth Summit
Period two
What’s wrong
with
the earth?
Air pollution
Water pollution
Trash/garbage
Deforestation
Desertification
War
Starvation
Overpopulation
Poverty
Aids
In order to help the injured earth， the United，
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