_______ is known to us all that the 2010 World Expo took place in Shanghai.A．ItB_刷题宝

题干

_______ is known to us all that the 2010 World Expo took place in Shanghai.

A．It

B．As

C．Which

D．What

上一题下一题 0.64难度单项选择更新时间:2012-09-06 05:00:10

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