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第140页

信息发布者：

surveys

formed

harmful

empty

recycle

are protected

will be discussed

will be built

covered

are closed

We should try our best to protect the environment.

Turn off the tap when brushing teeth.

Don't forget to use both sides of the paper.

Trees keep soil in place during storms. They can provide home for animals too.

I think our city will look nicer with more trees around.

Trees can reduce dust and keep the air clean.