题目内容
【题目】Had J known about this computer program, a huge amount of time and energy . (2010 .浙江)
would have been saved
B. had been saved
C. will be saved
D. was saved
【答案】A
【解析】分析句子结构可知前半句是省了if的倒装句,与过去事实相反,用虚拟语气,主句用would/might/could/should + have + 过去分词,从句用过去完成时,故选A。
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