is known to us all that the 2010 World Expo took place in Shanghai.A. ItB. AsC. WhichD. W

发布时间：2020-08-16 22:18:59

     is known to us all that the 2010 World Expo took place in Shanghai.
A. It
B. As
C. Which
D. What

网友回答

(答案→)A. It
B. As
C. Which
D. What
解析：考查it作为形式主语。真正的主语从句是后面的that the 2010 World Expo took place in Shanghai。
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