Life in the 21st century is much better than used to be.A. thatB. itC. what D. one

发布时间：2020-08-16 16:16:36

Life in the 21st century is much better than     used to be.
A. that
B. it
C. what
D. one

网友回答

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。
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