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    精英家教网 > 高中英语 > 题目详情
    As a saying goes, the wise man knows he knows nothing, _________ the fool thinks he knows all.
    A．whenB．whileC．asD．though
    B

    试题分析：考查连词：A. when当…时候，B. while当,..时候，虽然，然而，C. as 因为，随着，正如，D. though虽然，句意：俗话说，明者知自之不知，愚者自认无所不知。这里while表示对比，选B。
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