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    (   ) 2. Now Wechat is used      communicating instead of QQ by many people.

    A. by    B. for

    C. to    D. as

    2. B be used for doing…意为"被用来做……”。

    题目来源：仁爱英语同步练习册九年级上册下册合订本 > Topic1 When was it invented?

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