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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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