◎ 题干
—Look at the boy running on the ground . Is it David ?   
—It      be him. I saw him go to the teacher’s office just now.  
[     ]
A. must          
B. mustn't        
C. can't          
D. might
◎ 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“—Look at the boy running on the ground . Is it David ?—Itbe him. I saw him go to the teacher’s office just now.[ ]A. mustB. mustn'tC. can'tD. might…”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。