In my opinion, life in the twenty-first century is much easier than what it

问题描述:

In my opinion, life in the twenty-first century is much easier than what it
In my opinion, life in the twenty-first century is much easier than_____.
A. that used to be;B. what it is used to;C. what it was used to;D. what it used to be;
选D, 对吗?

D 我认为21世纪的生活比她以前容易的多.WHAT IT (指代现在的 life ) USED TO BE