◎ 题干
----Did you open the door?
-----Yes. I remembered _____it before you arrived.
A.openingB.being openedC.to openD.to have opened
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“----Did you open the door? -----Yes. I remembered _____it before you arrived.A.openingB.being openedC.to openD.to have opened…”主要考查了你对  【动词短语】【动词】  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。