◎ 题干
When people first saw his paintings, they ______ that they were looking through a hole in a  wall at a a real scene.

A. convince  
B. convinced  
C. were convinced  
D. convinced
◎ 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“When people first saw his paintings, they ______ that they were looking through a hole in a wall at a a real scene.[ ]A. convinceB. convincedC. were convince…”主要考查了你对  【一般过去时的被动语态】  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。