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题目
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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

答案
D
解析

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。
核心考点
试题【The calculations, had they been done by hand, ______all practical value by the t】;主要考察你对一般现在时等知识点的理解。[详细]
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