My father moved to Hainan in , when he was in .
A. the early 1990s; his thirties
B. early 1990s; his thirties
C. the early 1990’s; his thirty
D. early 1990’s; his thirty
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(答案→)A. the early 1990s; his thirties
B. early 1990s; his thirties
C. the early 1990’s; his thirty
D. early 1990’s; his thirty
解析：考查固定结构。In the 1990s在20世纪90年代；in his thirties在他三十多岁时。