◎ 题干
I warn them _____ with fire.    
[     ]
A. to play
B. not to play
C. playing
D. to playing
◎ 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“I warn them _____ with fire.[ ]A. to playB. not to playC. playingD. to playing …”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。