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

admin2013-05-15  27

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 本题考查虚拟语气的用法。句意:所涉及的数百万次的计算,若用手工进行,等到完成时恐怕早就失去一切实用价值了。在本句中,从句省略了if,把had提到了前面,变成了倒装句式。由于本句是与过去事实相反的假设,条件句的谓语动词用“had+过去分词”,主句的谓语动词用“would have done”。故选B。
转载请注明原文地址:https://kaotiyun.com/show/k0AR777K
0

最新回复(0)