◎ 题干
The boy is said ________ across the busy road when suddenly a car cut in and knocked him over.
[     ]
A. to be cycling    
B. to have cycled
C. to have been cycled    
D. to cycle
◎ 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 boy is said ________ across the busy road when suddenly a car cut in and knocked him over. [ ]A. to be cyclingB. to have cycledC. to have been cycledD. …”主要考查了你对  【不定式的进行式】  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。