◎ 题干
—_________ did you leave the classroom?
—___________ I saw my daughter sit down and read her book.
A.How long; AfterB.When; Until
C.How long; UntilD.When; 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“ —_________ did you leave the classroom? —___________ I saw my daughter sit down and read her book. A.How long; AfterB.When; UntilC.How long; UntilD.When; …”主要考查了你对  【介词短语】【介词】  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。