◎ 题干
— You ought to have made an apology to your English teacher last Sunday.
— Yes, I know I ____.

[     ]

A. ought to
B. have to
C. should have
D. must have
◎ 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“— You ought to have made an apology to your English teacher last Sunday.— Yes, I know I ____. [ ]A. ought to B. have to C. should have D. must have …”主要考查了你对  【虚拟语气】  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。