This is a difficult and stressful job but one you can really help people.A. thatB. where

问题补充：

This is a difficult and stressful job, but one you can really help people.

A. that

B. where

C. which

D. of which

答案：

A. that

(答案→)B. where

C. which

D. of which

解析：考查定语从句。先行词为job，one作job的同位语，同时是后面定语从句的先行词，从句中缺少地点状语，所以用where，相当于in which，故选B。