Collecting stamps as a hobby became increasingly popular dur

问题描述：

Collecting stamps as a hobby became increasingly popular during the past
fifty years.
A.错误
B.正确
1个回答 分类：英语 2014-10-26

问题解答：

我来补答
B,during the past few years 为完成时的标志,所以用 has become
加油哦～
 
 
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