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    精英家教网 > 高中英语 > 题目详情
    The calculations, had they been done by hand, ______all practical value by the time they were finished.
    A．had lostB．would loseC．should have lostD．would have lost
    D

    试题分析:句意：这些计算如果用手工进行的话，那么当他们完成后将失去所有的实际价值。句中had they been done是if they had been done的省略，是对过去的虚拟，所以主句谓语应该用would have done，选D。
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