Walter offered us a lift when he was leaving the office, but our work______, we declined the offer.

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问题 Walter offered us a lift when he was leaving the office, but our work______, we declined the offer.

选项 A、was not finished
B、has not been finished
C、did not finish
D、not having been finished

答案D

解析 our work not having been finished“我们的工作尚未完成”,为分词独立结构作状语,表示原因。注意:否定的分词短语中的否定词not必须放在整个分词短语的最前面而不能放在其后,如只能说not having been finished,而不能说having not been finished。
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