—Iwonderwhatmakesyouasuccessfulmanager.—I

問題詳情：

 —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

【回答】

D

知識點：一般過去時及其被動式

題型：選擇題