问题
选择题
A good friend is a person _______ we Turn for help when we are in trouble.
A．who
B．whom
C．to whom
D．to which
答案
答案：C
题目分析：考查定语从句。句义：朋友是你处于困境时可以求救的的人。把握关键词turn，构成短语：turn to sb,向某人求救，所以用介词to ,因为先行词是a person,是人所以用whom，所以C正确。