◎ 题干
. If only I ________ how to operate an electronic computer as you do.
A.had knownB.would know
C.should knowD.knew
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“. If only I ________ how to operate an electronic computer as you do. A.had knownB.would knowC.should knowD.knew…”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。