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    25． most wolves rely on their groups for food ,shelter and companionship ,they have developed a system of signals to keep the groups together. A．Because B．Although C．Unless D．Where 【查看更多】

     

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    ________ most wolves rely on their groups for food, shelter and companionship, they have developed a system of signals to keep the groups together.


    1. A.
      Because
    2. B.
      Although
    3. C.
      Unless
    4. D.
      Where

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        most wolves rely on their groups for food ,shelter and companionship ,they have developed a system of signals to keep the groups together.

    A．Because    B．Although   C．Unless      D．Where

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