◎ 题干
We ____ the task by the time he came to help us.   
[     ]
A. had finished    
B. finished    
C. finish        
D. will have finished
◎ 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“We ____ the task by the time he came to help us.[ ]A. had finishedB. finishedC. finish D. will have finished…”主要考查了你对  【过去完成时】  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。