问题补充：
Miss Li as a secretary for five years in the company, and now she is general manager of it.
A. serves
B. served
C. has served
D. had served
答案：
A. serves
(答案→)B. served
C. has served
D. had served
解析：考查时态：句意：李小姐在公司做秘书5年，现在是总经理了。因为这里的李小姐已不是秘书了。做秘书是过去的5年，用一般过去式，现在完成时表示动作从过去开始持续到现在，并可能会持续下去。选B。
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