问题
选择题
_____ is known to us all is that the Chinese government has spared no efforts to protect people from fake food. [ ]
A. As
B. It
C. That
D. What
答案
答案：D
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_____ is known to us all is that the Chinese government has spared no efforts to protect people from fake food. [ ]
A. As
B. It
C. That
D. What
答案：D