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How did it______ that humans speak so many different languages?

A. come out    B. come off   C. come about    D. come round

C


解析:

句意为:人类怎样会说这么多种语言,这种情况是如何产生的呢?come about发生;造成; come out出现‘出版;结果是;come off 脱落;进行;达到效果;come round恢复知觉;苏醒过来。

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