all living things are made up of cells,______we have learned before.

题目

all living things are made up of cells,______we have learned before.
A.that B.which C.as D.what
为什么用as而不用which

答案

as 和which 作关系代词时都可以代替整个主句,但如果有“正如.一样”,一般用as,如此句“正如我们说学过的那样”,故不用which
请在客户端右上角评价点“满意”即可