◎ 题干
 Only in this way, directed by the teacher, ______work out the problem the day before.
A.had they B.they could C.could they D.did they
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“Only in this way, directed by the teacher, ______work out the problem the day before.A.had theyB.they couldC.could theyD.did they…”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。