◎ 题干
-Is Mr Li in his office?
-No, he _____ in the office. He's ill in hospital.

[     ]

A. mustn't be
B. can't be
C. should be
D. needn't be
◎ 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“-Is Mr Li in his office? -No, he _____ in the office. He's ill in hospital. [ ]A. mustn't be B. can't be C. should be D. needn't be …”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。