I know Mr.Brown;we -- to each other at an international conf

问题描述:

I know Mr.Brown;we __ to each other at an international conference.
A.are introduced B.have been introduced C.were introduced D.had been introduced
1个回答 分类:英语 2014-09-21

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答案C 在一个国际会议上被介绍显然发生在过去.查看更多答案
 
 
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