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If computers______, many problems on space flight could not have been solved.A、h
If computers______, many problems on space flight could not have been solved.A、h
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2024-09-18
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问题
If computers______, many problems on space flight could not have been solved.
选项
A、had not been invented
B、are not invented
C、were not invented
D、have not invented
答案
A
解析
译文:如果没有发明计算机的话,太空飞行的许多问题就不可能解决。虚拟语气题。本题考查与过去事实相反的虚拟语气,其结构为“从句:If+主语+had+动词过去分词;主句:主语+should/would/might/would+have+动词过去分词”,故本题选[A]。
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