Question

___ has already been pointed out is that grammar is not a set of dead rules.

A．As

B．It

C．What

D．Which

Answer 1

C

解析试题分析：句意：我们需要指出的是语法不是一系列的死的条文。此处what在主语从句中作主语，意为：……的。故选C。
考点：考查名词性从句的连接词。