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The voice box has been a subject of considerable investigation among researchers studying the origins of language because they have believed for a long time that if humans did not have a low larynx, the use of vocal language was always impossible.

  • A

    if humans did not have a low larynx, the use of vocal language was always impossible

    分析该选项
  • B

    without a low larynx humans would never have been able to use vocal language

    分析该选项
  • C

    their use of vocal language was not ever possible for humans if they did not have a low larynx

    分析该选项
  • D

    without that low larynx, humans could not ever be able to use vocal language

    分析该选项
  • E

    never could humans use vocal language if they were not having that low larynx

    分析该选项
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正确答案: B

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