2. 外语
  3. 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

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.
选项
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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