◎ 题干
Walter offered us a lift when he was leaving the office, but our work _______, we refused his offer.
A.not finishingB.had not been finished
C.not having finishedD.not finished
◎ 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“Walter offered us a lift when he was leaving the office, but our work _______, we refused his offer.A.not finishingB.had not been finishedC.not having finishedD…”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。