◎ 题干
---Someone is knocking at the door. Who may it be?
---It ______ be Tom. He is still in the school.
A.can’tB.mustn’tC.couldn’tD.may not
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据n多题专家分析,试题“---Someone is knocking at the door. Who may it be? ---It ______ be Tom. He is still in the school.A.can’tB.mustn’tC.couldn’tD.may not…”主要考查了你对  【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。