初三.ppt
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Welcome!
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Unit 2 Topic 2
All these problems are very serious.
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Read after the tape.
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Play and Enjoy
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1. 良田变沙漠   ( change into )
2. 树木可以阻止风把泥土吹走。 ( stop… from )
3. 砍树对人类有害。( cut down, be harmful to )
Rich land has changed into desert.
Trees can stop wind from blowing the earth away.
Cutting down trees is harmful to human beings.
4. 垃圾占据了大量的空间。( take up, space )
Waste takes up a lot of space.
More exercises~~
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Fill in the blanks with the given words. (综合填空）
    As we know, pollution is very serious in today’s world.
    People have ____ down too many trees. Because of fewer and fewer trees, forests have gone. The water _______ the earth away. Lots of rich land has _________ into desert. Sandstorms ________ into being.
    Waste brings another problem. It’s _________ that waste harms the environment and ______ up a lot of space. It’s difficult for people________ new land to put the garbage in.
    Traffic pollution