◎ 题干
---Listen, Mum. I heard the footsteps. Is it Dad?
---It ___ be him. He’s gone to Beijing on business this morning.
A.can’tB.mustn’tC.needn’tD.shouldn’t
◎ 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“---Listen, Mum. I heard the footsteps. Is it Dad? ---It ___ be him. He’s gone to Beijing on business this morning.A.can’tB.mustn’tC.needn’tD.shouldn’t…”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。