◎ 题干
-Why do you look so worried?
-My computer broke down and my essay ________ unfinished since.
[     ]

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

◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“-Why do you look so worried?-My computer broke down and my essay ________ unfinished since.[ ]A.was left B.has leftC.leftD.has been left…”主要考查了你对  【现在完成时的被动语态】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。