◎ 题干
Don't forget  _____ the tap when you don't use it.
[     ]
A. turn off    
B. turn on    
C. to turn on    
D. to turn 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“Don't forget_____ the tap when you don't use it. [ ]A. turn offB. turn onC. to turn onD. to turn off…”主要考查了你对  【不定式】【介词】  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。