2. 专升本
  3. The millions of calculations (计算) had been done by hand, they______all practical value by the time they were finished.

The millions of calculations (计算) had been done by hand, they______all practical value by the time they were finished.

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问题 The millions of calculations (计算) had been done by hand, they______all practical value by the time they were finished.
选项 A、could lose
B、would have lost
C、might lose
D、ought to have lost
答案B
解析
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