◎ 题干
— You always forget to lock the door.
— Yes, but this time I forgot ______ the door.

A. to lock
B. have locked
C. have to lock
D. having locked
◎ 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“— You always forget to lock the door. — Yes, but this time I forgot ______ the door. [ ]A. to lock B. have locked C. have to lock D. having locked …”主要考查了你对  【动名词的完成式】  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。