【题目】— I wonder what makes you a good salesperson.
— I ________ as a waiter for three years,which contributes a lot to my today’s work.
A. serve B. served
C. have served D. had served
在线课程【答案】B
【解析】考查时态。根据题意，"我"当服务员这件事是发生在过去的，所以要用过去式。— 我想知道你怎样成为一名优秀的销售人员的。—我曾经当过三年服务员，这对我现在的工作很有帮助。故选B。