The middle-aged man over there, for life was oace very hard, is now a very successful businessman.
A. whom
B. whose
C. which
D. his
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(答案→)A. whom
B. whose
C. which
D. his
解析：定语从句考查题。先行词The middle-aged man，关系词whom做for的宾语。那边那名中年人现在是一名成功的商人，过去他的生活非常艰苦。选A