◎ 题干
You are supposed to read your article carefully and get it polished _____ you submit it.

A. until
B. when
C. before
D. after
◎ 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“You are supposed to read your article carefully and get it polished _____ you submit it. [ ]A. until B. when C. before D. after …”主要考查了你对  【从属连词】  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。