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-- Why do you look so worried ? -- My Ma...

-- Why do you look so worried ?

-- My MacBook Pro broke down and my paper _____ unfinished ever since.

A.left              B.was left           C.has been left       D.has left

 

C 【解析】 试题分析:考查时态:句意:--你为什么看起来这么担心?-- 我的MacBook Pro坏了,我的论文自从那时还留在那里没有完成。从ever since可知是现在完成时,从paper和leave的关系,可知是被动。选C。 考点:考查时态
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