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    They waited it was dark before leaving, they didn’t want anyone to see them leave. A. since; because B. until; as C. unless; for D. so; because 【查看更多】

     

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    They waited ________ it was dark before leaving, ________ they didn't want anyone to see them leave．


    1. A.
      since; because
    2. B.
      until; as
    3. C.
      unless; for
    4. D.
      so; because

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    They waited ________ it was dark before leaving, ________ they didn't want anyone to see them leave．

    [　　]

    A．since; because

    B．until; as

    C．unless; for

    D．so; because

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