Question

My frien, who ________ on the International Olympic Committee all his life, is retiring next month．

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A．served

B．is serving

C．had served

D．has served

Answer 1

答案：D
解析：

首先根据后面“is retiring next month”说明现在还在工作，另外根据all his life可知工作是持续的。持续到现在的动作或状态，应该用现在完成时。