外研版九年级英语上册《If everyone starts to do something，the world will be saved》Save our world PPT免费下载，共33页。
Look and say.
Farmers can’t use water for their crops because the rivers are polluted.
In some places, pollution from factories spreads over cities and villages.
So many cars use so much oil and cause pollution.
Waste gases from factories often pollute the air.
Rice farmers here still plant and harvest their crops by hand.
Language points
1.spread over的用法
And in some places, pollution from factories spreads over cities and villages.
spreads over: 分散，传开
2.a danger to 的用法
Pollution is a danger to our health.
a danger to: 对…的危险
3.it’s no use doing 的用法
It’s no use talking about things we can’t do.
it’s no use doing: 做某事没有用处
4.such as 的用法
Such as…?
such as: 例如
5.hopeless 的用法
Though pollution is heavy now, I don’t think it’s hopeless.
hopeless: 没有希望的
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关键词：If everyone starts to do something，the world will be saved PPT课件免费下载，.PPT格式；