2. 考研
  3. The millions of calculations involved, had they been done by hand, ______ all practical value by the time they were finished.

The millions of calculations involved, had they been done by hand, ______ all practical value by the time they were finished.

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问题 The millions of calculations involved, had they been done by hand, ______ 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 解此题的关键是要清楚该句是一个隐含了非真实条件句的虚拟句。had they been done by hand是一省略了连词if、主谓语进行了部分倒装的非真实条件句。从该条件句的谓语动词的时态来看，此虚拟句是对过去事实相反的假设，因此主句的谓语动词应该是would (could，should，might等)+动词的完成时，因此，B为正确答案。本题题意为：如果用人工来进行这些数以百万次计的计算，那么当这些计算完成时，它们也失去了任何实际意义。
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