◎ 题干
—Listen! Is Mary singing in the next room?
—No. It _______ be Mary.She has gone to Shanghai for an important meeting.
A.can’tB.may notC.mustn’tD.needn’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! Is Mary singing in the next room?—No. It _______ be Mary.She has gone to Shanghai for an important meeting.A.can’tB.may notC.mustn’tD.needn’t…”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。