◎ 题干
 No sooner _____ themselves in their seats in the theatre _______ the curtain went up.
A.they have settled; beforeB.had they settled; than
C.have they settled; whenD.they had settled;than
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“No sooner _____ themselves in their seats in the theatre _______ the curtain went up.A.they have settled; beforeB.had they settled; thanC.have they settled; …”主要考查了你对  【全部倒装】【部分倒装】【省略句】  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。