◎ 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
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“—Tom is never late for work. Why is he absent today? —Something_____ to him.[ ]A. must happenB. should have happenedC. could have happenedD. must have hap…”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。