题目内容
It ________ that scientists have found the reason ________ Edison was so clever.
[ ]
A．said, that
B．said, why
C．is said, why
D．is said, that
答案：C
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解题点拨 It is said that接一个从句意为据说，即该从句所表达的内容是据别人所说． |
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