◎ 题干
Had they known what was coming next, they________   second thoughts.
A.may haveB.could haveC.must have hadD.might have had
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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 they known what was coming next, they________second thoughts.A.may haveB.could haveC.must have hadD.might have had…”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。