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The millions of calculations involved, ______ by hand, would have lost all practical value by the time they were finished.
The millions of calculations involved, ______ by hand, would have lost all practical value by the time they were finished.
admin
2010-04-24
41
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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0
专业英语四级
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