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  • 科目:英语
  • 题型:单选题
  • 难度:中等
  • 人气:864

—I wonder what makes you a successful manager.
—I ________ as a waiter for five years,which contributes a lot to my today’s work.

A.serve B.have served
C.had served D.served
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—Iwonderwhatmakesyouasuccessfu