问题
选择题
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
答案：D
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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：D
