◎ 题干
The student you considered ______ hardest failed to pass the important examination.     

A. to have studied  
B. having studied  
C. to study  
D. studying
◎ 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“The student you considered ______hardest failed to pass the important examination. [ ]A. to have studiedB. having studied C. to study D. studying …”主要考查了你对  【不定式的完成式】  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。