______the doors were closed and that all the lights were off, the boy left the classroom.
A．Check
B．To check
C．Checked
D．Having checked
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◎ 解析
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◎ 知识点
根据n多题专家分析，试题“______the doors were closed and that all the lights were off, the boy left the classroom.A．CheckB．To checkC．CheckedD．Having checked…”主要考查了你对 【现在分词的被动式】，【现在分词】，【不定式的被动式】，【过去分词】 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。
◎ 相似题
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