(单选题)They went _____ the schedule for the conference again and again until they felt satisfied with every detail of it.(本题1.0分) A.our B.up C.over D.by

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题目内容（桂林理工大学大学英语4）

(单选题)They went _____ the schedule for the conference again and again until they felt satisfied with every detail of it.(本题1.0分)
A.our
B.up
C.over
D.by

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