their lessons, they went to the cinema.A. FinishingB. Had finishedC. FinishedD. Having fi

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A. Finishing
B. Had finished
C. Finished
(答案→)D. Having finished
解析：考查非谓语动词。句意：由于已经完成了课程，他们去看电影了。现在分词表示正在进行的伴随性动作，其逻辑主语为句子主语，如果动作发生在主语动作之前，则用完成时态的现在分词，故选D。