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：

首先根據后面“is retiring next month”說明現在還在工作，另外根據all his life可知工作是持續的。持續到現在的動作或狀態，應該用現在完成時。