◎ 题干
It _____ that scientists have found the reason _____ Edison was clever.
[     ]
A. said, that
B. said, why
C. is said, that
D. is said, why
◎ 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“It _____ that scientists have found the reason _____ Edison was clever.[ ]A. said, that B. said, whyC. is said, that D. is said, why …”主要考查了你对  【关系副词】【被动语态】【定语从句】  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。