问题
n he was in, he went abroadto study in America.
A:the 1980s; his twenties
B:1980s; the twenties
C:the 1980s; the twenties
D:1980s; his twenties
B:1980s; the twenties
C:the 1980s; the twenties
D:1980s; his twenties
正确答案是：
