◎ 题干
-Alice,why didn't you come yesterday?
-I_______,but I had an unexpected visitor.
[    ]
A. had                
B. would                  
C. was going to          
D. did
◎ 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“-Alice,why didn't you come yesterday?-I_______,but I had an unexpected visitor.[ ]A. had B. wouldC. was going to D. did…”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。