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信息发布者：

messy

make

Wait

Hurry

put

help

pick

first

takes

the

to

What's

making

What

do

to

Don't

put

C

A

B

They went to work by bike or on foot.

There were green hills, fresh air and many old houses.

Because people throw rubbish everywhere.

More smoke from taxis, cars and buses makes the air dirty.

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