◎ 题干
—I called you yesterday evening, but there was no answer.  
—Oh, I am sorry. I ______ dinner at my friend's home.  
[     ]
A. have    
B. had        
C. was having    
D. have had
◎ 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“—I called you yesterday evening, but there was no answer. —Oh, I am sorry. I______ dinner at my friend's home.[ ]A. have B. hadC. was having D. have had…”主要考查了你对  【过去进行时】  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。