第79页

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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