A-A+
The millions of calculations involved had the
问题详情
The millions of calculations involved, had they been done by hand, ______ all practical value by the time they were finished.
A．could lose
B．might lose
C．would have lost
D．ought to have lost
参考答案
正确答案：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。
