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2023.4.11英语练习

2023-04-11 16:57:48.226.0.19621

2023.4.11英语练习 在线考试 答题题目
1、 The millions of calculations involved, ____by hand, would have lost all practical value by the time they were finished.
  • A、 had they been done
  • B、 they had been done
  • C、 having been done
  • D、 they were done


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