◎ 题干
I was late for school today because my alarm clock _      .            
[     ]
A. went off      
B. had gone off    
C. stopped      
D. had stopped
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“I was late for school today because my alarm clock _.[ ]A. went off B.had gone offC.stoppedD.had stopped…”主要考查了你对  【动词短语】【过去完成时】  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。