—Iwonderwhatmakesyouasuccessfulmanager.—I

问题详情：

 —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

知识点：一般过去时及其被动式

题型：选择题