◎ 题干
Joan stood outside a shopping mall for a long time, as if ________ somebody.
[     ]
A. to wait for      
B. waiting for      
C. waited for      
D. having waited for
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Joan stood outside a shopping mall for a long time, as if ________ somebody.[ ]A. to wait for B. waiting forC. waited for D. having waited for…”主要考查了你对  【现在分词】  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。