◎ 题干
--- Where is Jack? I can’t find him anywhere.
--- He ______ his homework upstairs.
A.might have done B.must have doneC.might be doingD.must do
◎ 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“--- Where is Jack? I can’t find him anywhere.--- He ______ his homework upstairs.A.might have done B.must have doneC.might be doingD.must do…”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。