单选题the maths problem is ____ difficult _____
问题描述：
单选题the maths problem is ____ difficult _____
A so ;that few of us can do..B so ;that few of us can do it
C too;for anyoneof us to doD too;for anyone of us to do it
请说原因
答
c请说原因itstoo difficult for anyone of us to do the math problem是他的同义句 这里it 作形式主语真正的主语是the maths problem那为什么不选A