◎ 题干
The worker witnessed ________ seen the accused near the scene of the crime.
[     ]
A. to have  
B. to having
C. for having  
D. having
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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 worker witnessed ________ seen the accused near the scene of the crime.[ ]A. to haveB. to havingC. for havingD. having…”主要考查了你对  【介词和介词短语】【动名词】  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。