She as the first lady of Republic of Korea instead of her mother for five years when her father ruled the country.
A. serves
B. has served
C. had served
D. served
网友回答
A. serves
B. has served
C. had served
(答案→)D. served
解析：考查时态。本题的关键是后面的时间状语for five years when her father ruled the country.这是一个表示过去时的时间状语。句意:在他父亲统治韩国的五年里，不是她的母亲，而是她作为韩国的第一女士。故D正确。