◎ 题干
—Show me your permit, please.
—Oh, it's not in my pocket. It ________.
A.must have fallen outB.might fall out
C.could fall outD.should have fallen out
◎ 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“—Show me your permit, please.—Oh, it's not in my pocket. It ________.A.must have fallen outB.might fall outC.could fall outD.should have fallen out…”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。