2. 职称英语
  3. The millions of calculations involved, had they been done by hand, ______all pra

The millions of calculations involved, had they been done by hand, ______all pra

游客2025-03-20  29
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 这是一个与过去事实相反的虚拟语气句，从句had they been done by hand插在主句中，采用倒装形式省略了连词if，表示非真实条件，主句中有明确的时间状语by thetime they were finished指过去，因此选择B。全句的意思是"所涉及的数以百万计的计算如果用手算的话，到算完时也就完全失去了实际价值了"。
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