We're very grateful to the teachers _ taught us in our high school.
问题描述：
We're very grateful to the teachers _ taught us in our high school.
A.which
B.what
C.who
D.whose
请说原因
答
C 这是一个定语从句,先行词是teachers,which指代物/事,who 指代人
whose表示“人的”、“物的”,与题意不符
what的作用相当于“先行词+关系代词”,因此what前不能有先行词,what不引导定语从句