◎ 题干
— The light in the office is still on.   
— Oh, I forgot _______.   
[     ]
A. turning it off    
B. turn it off   
C. to turn it off    
D. having turned it off
◎ 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“—The light in the office is still on.— Oh, I forgot _______.[ ]A. turning it off B. turn it off C. to turn it off D. having turned it off …”主要考查了你对  【不定式】  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。