Some people are still strong and healthy---their 60s and 70s

问题描述:

Some people are still strong and healthy___their 60s and 70s.( )
A.in B.during C.for D.after
这道题我选的是B,请说明一下B错的原因,
1个回答 分类:英语 2014-12-04

问题解答:

我来补答
in one's 60s 是指在某人60几岁的时候,是固定词组拉
 
 
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