It is believed that life in the twenty-first century is much easier than _____

题干

It is believed that 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

上一题下一题 0.64难度单项选择更新时间:2015-02-06 07:35:29

小学学科试题库

初中学科试题库

高中学科试题库