___is it ___has made you feel so upset?A.What; that B.How; which C.When; what D.Which; as
问题描述：
___is it ___has made you feel so upset?A.What; that B.How; which C.When; what D.Which; as
答
A
强调句倒装了.
It's what that has made you feel so upset.
需要主语,选what；组成强调句型,选that.