问题
选择题
My friend, who _____ on the International Olympic committee all his life, is retiring next month. [ ]
A. served
B. is serving
C. had served
D. has served
答案
答案：D
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My friend, who _____ on the International Olympic committee all his life, is retiring next month. [ ]
A. served
B. is serving
C. had served
D. has served
答案：D