◎ 题干
--- Who ______ it be that is singing in the next room?
--- It _______ be Lucy, but I am not sure.
A.can ; mayB.may ; canC.can; mustD.must; may
◎ 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“--- Who ______ it be that is singing in the next room?--- It _______ be Lucy, but I am not sure.A.can ; mayB.may ; canC.can; mustD.must; may…”主要考查了你对  【虚拟语气】【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。