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第220页

信息发布者：

F

B

E

serious

produces/causes

separate

carelessly

reduce

helping

will be punished

richest

digging

to study

will be used

to build/for building

drive (cars) to work

produce/cause/lead to serious

air pollution

take some simple steps to

make a big/great difference to

depend on nature's rich resources to live

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