◎ 题干
- What's wrong with you, Madam?
- I've lost my valuable painting. But a week had gone by _______ I knew it was missing.
A.whileB.sinceC.untilD.before
◎ 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“ - What's wrong with you, Madam? - I've lost my valuable painting. But a week had gone by _______ I knew it was missing.A.whileB.sinceC.untilD.before…”主要考查了你对  【并列连词】【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。