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 |