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    Nowadays, more and more people are using private cars, has caused a lot of traffic problems, especially in large cites like Beijing and Shanghai. A. that B. which C. it D. they 【查看更多】

     

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    Nowadays, more and more people are using private cars, ________ has caused a lot of traffic

    problems, especially in large cites like Beijing and Shanghai.

    A. that                  B. which            C. it                   D. they

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