I all the exercises before our teacher collected the exercise books. A. have finished B.——青夏教育精英家教网——

摘要： I all the exercises before our teacher collected the exercise books. A. have finished B. finished C. had finished D. finish

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I all the exercises before our teacher collected the exercise books.

A. have finished
B. finished
C. had finished
D. finish

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I _________all the exercises before our teacher collected the exercise books．

A．have finished B．finished C．had finished D．finish

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