◎ 题干
___ the danger of drunk driving, many drivers promised never to drive after drinking.  
[     ]
A. To realize    
B. To have realized    
C. Realized    
D. Having realized
◎ 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“___ the danger of drunk driving, many drivers promised never to drive after drinking.[ ]A. To realize B. To have realized C. Realized D. Having realized…”主要考查了你对  【现在分词的完成式】  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。