no matter what只可以引导状语从句 是不能引导名词性从句的,例如主语从句,宾语从句
而whatever可以引导状语从句,名词性从句,范围比较广
本题中whatever happened between Mary and me 是主语,所以whatever引导主语从句.所以选whateve
no matter what只可以引导状语从句 是不能引导名词性从句的,例如主语从句,宾语从句
而whatever可以引导状语从句,名词性从句,范围比较广
本题中whatever happened between Mary and me 是主语,所以whatever引导主语从句.所以选whateve