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The millions of calculations involved, ______ by hand, would have lost all pract
The millions of calculations involved, ______ by hand, would have lost all pract
游客
2023-11-18
16
管理
问题
The millions of calculations involved, ______ by hand, would have lost all practical value by the time they were finished.
选项
A、had they been done
B、having been done
C、they had been done
D、they were done
答案
A
解析
虚拟语气。空格处为虚拟条件句了连词if,那么要部分倒装。
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