问题补充:
Life in the 21st century is much better than used to be.
A. that
B. it
C. what
D. one
答案:
A. that
(答案→)B. it
C. what
D. one
解析:考察it做形式主语。本题中it代替前文Life in the 21st century做下文形式主语,其它选项没有这个用法,故选B。
时间:2019-07-12 13:23:55
Life in the 21st century is much better than used to be.
A. that
B. it
C. what
D. one
A. that
(答案→)B. it
C. what
D. one
解析:考察it做形式主语。本题中it代替前文Life in the 21st century做下文形式主语,其它选项没有这个用法,故选B。