The millions of calculations involved, had they been done by hand, ______ all pr

游客2023-11-21  21

问题 The millions of calculations involved, had they been done by hand, ______ all practical value by the time they were finished.

选项 A、could lose
B、might lose
C、would have lost
D、ought to have lost

答案 C

解析 虚拟语气用在条件句中表示对过去的假设,从句使用过去完成时,主句使用“would(should, could,might)+have done",如:If natural resources had been fully utilized,industry would have developed more rapidly.如果自然资源得到了充分利用,工业的发展本可以更快些。
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