◎ 题干
Had I known about this computer program, a huge amount of time and energy       .
A.would have been savedB.had been saved
C.will be savedD.was saved
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Had I known about this computer program, a huge amount of time and energy .A.would have been savedB.had been savedC.will be savedD.was saved…”主要考查了你对  【虚拟语气】【情态动词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。