◎ 题干
Mary had to go to a meeting,so she left her children________at home.
[     ]
A.playing  
B.played
C.to play  
D.having played
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Mary had to go to a meeting,so she left her children________at home.[ ]A.playingB.playedC.to playD.having played…”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。