问题描述：
My friend,who on the International Olympic Committee all his life,is retiring next
My friend,who ———on the International Olympic Committee all his life,is retiring next month.（06浙江卷）
A．served B．is serving C．had served D．has served
My friend,who ———on the International Olympic Committee all his life,is retiring next month.（06浙江卷）
A．served B．is serving C．had served D．has served
问题解答：
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