◎ 题干
----Look at the boy running on the playground. Is it David?
---- It ______ be him. I saw him go to the teachers’ office just now.
A.mustn’tB.can’tC.may notD.needn’t
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“----Look at the boy running on the playground. Is it David? ---- It ______ be him. I saw him go to the teachers’ office just now.A.mustn’tB.can’tC.may not…”主要考查了你对  【实义动词的单数第三人称形式】【实义动词】【动词短语】  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。