◎ 题干

—Where is Bob? I cannot find him anywhere.
—He       have been off long. I heard him make a call just now.
A.shouldn’tB.can’tC.mustn’tD.needn’t
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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 Bob? I cannot find him anywhere.—Hehave been off long. I heard him make a call just now.A.shouldn’tB.can’tC.mustn’tD.needn’t…”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。