◎ 题干
We were all waiting for you. You _____ for the seaside by yourself without
leaving a message.
A.mustn’t leaveB.shouldn’t have left
C.could not have leftD.needn’t leave
◎ 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“We were all waiting for you. You _____ for the seaside by yourself withoutleaving a message.A.mustn’t leaveB.shouldn’t have leftC.could not have leftD.needn’…”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。