◎ 题干
The coal miners ____ in the coal mine for 10 hours before we came to their rescue.

A. had trapped
B. had been trapping
C. had been trapped
D. would have been trapped
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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 coal miners ____ in the coal mine for 10 hours before we came to their rescue. [ ]A. had trapped B. had been trapping C. had been trapped D. would have …”主要考查了你对  【过去完成进行时】  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。