The millions of calculations involved, had they been done by hand, ______________________ (恐怕早就失去了所有价值) by the time they were fi

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问题 The millions of calculations involved, had they been done by hand, ______________________ (恐怕早就失去了所有价值) by the time they were finished.

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答案would have lost all practical value

解析 本题考查对虚拟语气用法的掌握以及对插入语的理解。had they been done by hand 是一个省略了连词if的倒装虚拟条件句(正常语序为if they had been done by band),并作为插入语放在了主句主语和谓语动词之间,从句谓语采用的是had done的形式,那么主句谓语则应采用would have done 的形式。
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