◎ 题干
Two fifths of the highway________so far.
[      ]
A. has been completed  
B. was completed
C. have been completed  
D. has completed
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Two fifths of the highway________so far.[ ]A. has been completedB. was completedC. have been completed D. has completed…”主要考查了你对  【现在完成时的被动语态】【主谓一致】  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。