◎ 题干
______, the conference began.
A.The candidates having taken their seats
B.The candidates had taken their seats
C.Taken their seats
D.Taking their seats
◎ 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“ ______, the conference began.A.The candidates having taken their seatsB.The candidates had taken their seatsC.Taken their seatsD.Taking their seats…”主要考查了你对  【独立主格结构】  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。