一个高中英语句子的结构分析--------此题很难,In my opinion,life in the twenty-first century is much easier than it used to be.我重点想知道最后的it used to be是不是省略了什么?如果是的话,请补充完整.并标准翻译.
问题描述：
一个高中英语句子的结构分析--------此题很难,
In my opinion,life in the twenty-first century is much easier than it used to be.
我重点想知道最后的it used to be是不是省略了什么?如果是的话,请补充完整.并标准翻译.
答