问题补充:
Mr. Smith is quite generous and warm-hearted, a person you can turn when having trouble.
A. for whom
B. with whom
C. to whom
D. of whom
答案:
A. for whom
B. with whom
(答案→)C. to whom
D. of whom
解析:句意:斯密斯先生是很大方和热心肠的人,一个你有麻烦可以求助的人。这里使用了定语从句,先行词是a person,定语从句中用的是turn to sb,所以填to whom,选C。