译林版（三起）英语六年级上册《Then and now》PPT下载(第4课时)
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人教版六年级英语下册《Then and now》PPT下载(第4课时)，共19页。
Warming up
Could you tell us about your change?
知识讲解
I read a book. It was really interesting.
Could you tell me the story?
Cavemen often ate raw meat. They didn't cook their food.
Now there are many things to help you cook.
In 2050, there will be house robots. They will cook, clean and wash the dishes.
There were many trees, and there were many clean rivers.
Now, there are more and more buildings.
We should help the earth now, so birds will have homes and the forests will be healthy and green again.
课堂小结
Cavemen often ate raw meat. They didn't cook their food.
穴居人经常吃生肉。他们不做饭。
We should help the earth now, so birds will have homes and the forests will be healthy and green again.
我们现在应该帮助地球，这样鸟类将有家，森林将再次健康和绿色。
Before humans lived on the earth, whales already lived in the sea.
在人类生活在地球上之前，鲸鱼已经生活在海里了。
If we change now, whales and humans will have a bright future.
如果我们现在改变，鲸鱼和人类将有一个光明的未来。
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