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Cars play an important role in modern life , but they also cause many problems l

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Cars play an important role in modern life , but they also cause many problems l

 Cars play animportant role in modern life , but they            alsocause many problems like air pollution.

  A.should         B.can            C.must            D. will   

 

试题答案

【答案】

 B

 

标签：moderninlifetheybut

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