◎ 题干
— Tom is never late for work. Why is he absent today?
— Something __________to him.     
[     ]
A. must happen  
B. should have happened    
C. could have happened    
D. must have happened
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“— Tom is never late for work. Why is he absent today?— Something __________to him.[ ]A. must happen B. should have happened C. could have happenedD. must …”主要考查了你对  【情态动词】【现在完成时】  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。