来源:赖氏英文文法
John is not such a man ____ would kill anyone.
(A) that (B) as (C) who (D) whom
作者说答案是B，因为有such；且可以把as当成as the man who。
所以这句的原句是John is not such a man as the man who would kill anyone.
我想请问，那如果把such拿掉呢?答案还是会是as吗?是不是可以用that或who代替?
又，为什么有了such就一定要用as，不能用that与who呢? 英文文法有此硬性规定吗?