Question

有一道选择题___is orten the case,my mother has the final say in th

Answer 1

as is often the case 这是固定搭配,意为" 情况常常如此/通常就是这样" ,此处,as引导定从,指代后面整个句子,当然你也可以把as is often the case 看着一个整体.

若用 it,那么两句中间要用that相连,即 It is often the case that my mother has the final say in the argument. 这时, It 作形主, that从句作真正的主语.

that 和 what 只能引导名词性从句,而___is often the case,根本就不能成为一个名词性从句（即主从,宾从,表从,同位语从句）