◎ 题干
The boy who was believed _____ in the last exam was being questioned by the teacher when I entered his office.
[     ]
A. to cheat  
B. cheating    
C. to have cheated  
D. having cheated
◎ 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 who was believed _____ in the last exam was being questioned by the teacher when I entered his office. [ ]A. to cheat B. cheating C. to have cheated …”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。