◎ 题干
When Alice came to, she did not know how long she ______ there.

A. had been lying      
B. has been lying    
C. was laying          
D. has lain
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“When Alice came to, she did not know how long she ______ there.[ ]A. had been lyingB. has been lying C. was layingD. has lain…”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。