--- Millions of you people all over the country came to Shenzhen in _______.

题目

--- Millions of you people all over the country came to Shenzhen in _______.
(A.1980s B.the 1980s)
--- Yes,my grandfather was one of them.He came here in his _______.
(A.twenties B.twentieth)

答案

第一题是B,1980s代表20世纪80年代,如果年份的后面加s,那前面就要用the；如果没有s只是1980,那前面就不用加the.
第二题是A,代表二十几岁的时候；B代表刚好二十岁的时候,那前面就不能用in而应该用at.
希望能帮的上您.