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        1. My frien, 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:

          首先根據(jù)后面“is retiring next month”說明現(xiàn)在還在工作,另外根據(jù)all his life可知工作是持續(xù)的。持續(xù)到現(xiàn)在的動作或狀態(tài),應(yīng)該用現(xiàn)在完成時。


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