In when he was in he went abroad to study in America.A. the 1980s; his twentiesB. 1980s;

问题补充：

In, when he was in, he went abroad to study in America.

A. the 1980s; his twenties

B. 1980s; the twenties

C. the 1980s; the twenties

D. 1980s; his twenties

答案：

(答案→)A. the 1980s; his twenties

B. 1980s; the twenties

C. the 1980s; the twenties

D. 1980s; his twenties

解析：本题的含义为在20世纪80年代，当他20几岁的时候，他出国到美国学习，in the+年代的复数表示多少世纪多少年代的含义，in one’s+20以上整十的复数表示几十多岁的含义，本题中in his twenties表示20几岁的含义，故本题选A。