求一篇大约雅思6.0左右的作文 好背点的In some countries,the proportion of elderly people will become higher than the proportion of younger people.Will this be a positive or a negative development?好的话50分都给你了
问题描述：
求一篇大约雅思6.0左右的作文 好背点的
In some countries,the proportion of elderly people will become higher than the proportion of younger people.Will this be a positive or a negative development?
好的话50分都给你了
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