is known to us all is that the World Expo 2010 will take place in Shanghai.A. ItB. WhatC

发布时间：2020-08-16 08:07:16

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

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A. It
(答案→)B. What
C. As
D. Which
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