◎ 题干
Only after they had discussed the matter for several hours _____ a decision.
[     ]
A. they reached
B. did they reach
C. they reach
D. do they reach
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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 after they had discussed the matter for several hours _____ a decision. [ ]A. they reached B. did they reachC. they reach D. do they reach …”主要考查了你对  【部分倒装】  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。