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    In the last twenty years, seven Canadian scientists _____ the Nobel prize!

    A．wonB．had wonC．was winningD．have won

    D

    解析试题分析：考查时态：句意：在过去的20年中，7个加拿大科学家获得了诺贝尔奖。时间状语是. In the last twenty years,一般和现在完成时连用，选D。
    考点：考查时态

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