◎ 题干
—Who is that man?    
—That _____be Mr. Green. He always walks this way. Hi!  Mr. Green.    
[     ]
A. can    
B. may  
C. need      
D. must
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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 is that man?—That _______ be Mr. Green. He always walks this way. Hi! Mr. Green. [ ]A. can B. may C. need D. must …”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。