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    精英家教网 > 高中英语 > 题目详情
    How can you expect him to make any improvement ________ you never give him an opportunity to have a try?
    A．unlessB．whenC．untilD．while
    B

    试题分析：考查连词：A．unless 除非，B．when当…时候，既然，如果，C．until直到，D．while即使，虽然，然而，当…时候，句意：既然你不从来不给他任何机会去尝试，你又怎么能够知道他不会有任何的进步呢？选B。
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