professor also mentioned an artide ( )by Zhu Ziqing

问题描述:

professor also mentioned an artide ( )by Zhu Ziqing
A.supposed to have been written B.supposed to be written
C.supposing to have been written D.supposing to be written
1个回答 分类:英语 2014-09-24

问题解答:

我来补答
A be supposed to 结构 ,应该做某事 ,非谓语选择 supposed to
to have been done 是 不定式的完成式 ,表示动作发生在主句谓语动作之前.
 
 
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