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19.(06浙江16)

 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

解析  考查动词的时态。根据时间状语all his life判断,此处应用完成时态。根据主句的谓语动词is retiring知,应用现在完成时态。

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