问题补充:
His father served in the army in when he was in .
A. the 1950s; his twenties
B. 1950s; twenties
C. 1950’s, the twentieth
D. the 1950s; the twentieth
答案:
(答案→)A. the 1950s; his twenties
B. 1950s; twenties
C. 1950’s, the twentieth
D. the 1950s; the twentieth
解析:in the 1950s ,in his twenties 表示在他的几十,故选A