问题补充:
It was not rare(稀少) in that people in fifties were going to school for further study.
A. 90s; the
B. the 90s; /
C. 90s; their
D. the 90s; their
答案:
A. 90s; the
B. the 90s; /
C. 90s; their
(答案→)D. the 90s; their
解析:考查词组:第一空考查in the+年代的复数或加’s,是在多少世纪多少年代,第二空考查in one’s 数词的复数,表示“在某人多少岁的时候”,句意:在90年代,很少有人在50几岁的时候还去上学深造的。选D。