单选题 She got to know the young man very well ______ she had worked for so long.
A) to whom B) in whom C) whom D) with whom

【正确答案】 C

【答案解析】句意：她跟那个年轻小伙子很熟悉，她为他干活很长时间了。因work后面已有介词for，所以无需在whom前面加介词，ABD三项皆不对。故选C项。