7.When it air pollution, Beijing faces the three “C s.cars.coal and construction.which lead to Beijing's thick air pollution. A.refers to B.comes to C.happens to D.speaks to 查看更多

 

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When it    air pollution, Beijing faces the three “C” s,cars,coal and construction,which lead to Beijing's thick air pollution.

A.refers to    B.comes to    C.happens to   D.speaks to

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When it       air pollution, Beijing faces the three“C”s,cars,coal and construction,which lead to Beijing's thick air pollution.

A.refers to                B.comes to            C.happens to              D.speaks to

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When it ________ air pollution, Beijing faces the three “C” s-cars,coal and construction,which lead to Beijing's thick air pollution.

[  ]
A.

refers to

B.

comes to

C.

happens to

D.

speaks to

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When it______ air pollution, Beijing faces the three “C” s-----cars,coal and construction,which lead to Beijing's thick air pollution.

A. refers to                B. comes to               C. happens to           D. speaks to

 

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When it______ air pollution, Beijing faces the three “C” s-----cars,coal and construction,which lead to Beijing's thick air pollution.

A. refers to            B. comes to           C. happens to         D. speaks to

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