◎ 题干
The play _______ for 10 minutes when we arrived at the theater.   
[     ]
A. had begun    
B. has been on        
C. had been on    
D. began
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“The play _______ for 10 minutes when we arrived at the theater.[ ]A. had begunB. has been onC. had been onD. began…”主要考查了你对  【过去完成时】【介词】  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。