As ________ announced in today's papers,the Shanghai Export Commodities Fair is also open on
问题描述：
As ________ announced in today's papers,the Shanghai Export Commodities Fair is also open on
37.As ________ announced in today’s papers,theShanghai Export Commodities Fair is also open on Sundays.
A) being
B) is
C) to be
D) been（B）
为什么不能用A
答
as 此处代表后面的“theShanghai Export Commodities Fair is also open on Sundays.”这个事实,这个事其实是主语,所以用is.