问题
选择题
Through years of hard work, Mrs. Smith, who ____ as a secretary for five years, is general manager of the company now.
A．serves
B．served
C．has served
D．had served
答案
答案：B
题目分析：考查时态。根据句意可知史密斯女士当秘书5年，是过去的事实，故用一般过去时。句意：通过多年的努力，当了5年秘书的史密斯女士，现在时公司总经理了。故B正确。