◎ 题干
When the fire fighters came, they had already ________ the fire.
[     ]
A. put up  
B. put out  
C. put on  
D. put off
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“When the fire fighters came, they had already ________ the fire.[ ]A. put upB. put outC. put onD. put off…”主要考查了你对  【动词短语】  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。