We are very lucky to live in the . [ ]A. 21 centuriesB. 21st centuriesC. 21 centuryD. 21st century-初中英语-n多题

◎ 题干

We are very lucky to live in the .

A. 21 centuries
B. 21st centuries
C. 21 century
D. 21st century

◎ 答案

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◎ 解析

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◎ 知识点

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