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TheMP3wasboughtyesterdayisn'tworkingnow.itneedstoberepaired.AwhichB不填CwhoDwhom选哪个?为什么?

题目详情
The MP3______was bought yesterday isn't working now.it needs to be repaired.
A which B不填 C who Dwhom
选哪个?为什么?
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答案和解析
A
因为The MP3 是“物”,定语从句缺主语,故用指物的关系代词which
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