They ()very busy.a:both.b:all are.c:are both.d:are all.

问题描述:

They ()very busy.a:both.b:all are.c:are both.d:are all.
1个回答 分类:综合 2014-11-02

问题解答:

我来补答
c和d都可以选啊,肯定有前文吧?
are both表示俩个都
are all表示(三者或以上)都
 
 
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