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    4．You'll fail your exam you start to work hard now． A．because B．unless- C．so D．or 【查看更多】

     

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    You'll fail your next exam _______ you start to work hard at your lessons now．
    [     ]
    A．because        
    B．if    
    C．so          
    D．unless

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    You'll fail your next exam ________ you start to work hard at your studies now．

    [　　]

    A．because

    B．unless

    C．so

    D．why

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