◎ 题干
          all the exercises before our teacher collected the exercise books.

[     ]

A. have finished
B. finished
C. had finished
D. finish
◎ 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“I all the exercises before our teacher collected the exercise books. [ ]A. have finished B. finishedC. had finishedD. finish …”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。