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师梦圆初中英语教材同步人教版九年级全一册Section B 3a—3b Self check下载详情
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内容预览

hemp

It was made from...

2.Who was it invented by?

It was invented by Cai Lun.

3.When was it invented?

What was paper used for in ancient China?

It was mainly used for writing and drawing.

It was spread to ... in the ...century.

With the help of paper,China’s long and colorful culture was spread to the world.

writing

folding

printing

It is used for ...

cleaning

packing

Problems

In order to produce paper...

A large number of trees are cut down.

Many woods and forests are disappearing.

The environment is polluted.

Tons of paper is thrown away.

Every year

People are throwing paper here and there.

What should we do ?

To protect the environment, I think we should ...

save

plant

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