问题
选择题
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
答案
D
题目分析：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。
考点：