Being a doctor is one of the few professions＿＿＿＿if you make a mistake，it can mean somebody's life．
A. that
B. which
C. when
D. where
网友回答
A. that
B. which
C. when
(答案→)D. where
解析：此处the few professions是先行词，其在定语从句中作地点状语，故用where。这里相当于in the few profession. 句意：当医生是如果出错就出人命的几种职业之一。