问题
选择题
In my opinion, life in the twenty-first century is much easier than _____. [ ]
A. that used to be
B. it is used to
C. it was used to
D. it used to be
答案
答案：D
搜题请搜索小程序“爱下问搜题”
In my opinion, life in the twenty-first century is much easier than _____. [ ]
A. that used to be
B. it is used to
C. it was used to
D. it used to be
答案：D