◎ 题干
All the task ____ ahead of time, they decided to go on holiday for a week.
[     ]
A. had been finished
B. were finished
C. having been finished
D. been finished
◎ 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“All the task ____ ahead of time, they decided to go on holiday for a week. [ ]A. had been finished B. were finished C. having been finished D. been finished…”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。