问题补充:
—Does Li Ping serve in the army?
—No, but he in the army for five years.
A. served
B. has served
C. is serving
D. would serve
答案:
(答案→)A. served
B. has served
C. is serving
D. would serve
解析:由答语No可知他现在不在部队服役,是以前“服过役”,故用一般过去时。千万不要被时时状语for three years所迷惑,而错选答案B。