高一的定语从句

问题描述:

高一的定语从句
I didn't believe then at first but in fact everything ___was true.
a.they said
b.what they said
c.whose they said
d.that said

肯定选择A 那个then 应该是them吧 这里A项作定语从句来修饰everything 关联词that省略因为做的是(said)宾语