________theirhomework,thechildrenwe

发布时间：2020-07-26 18:30:44

________ their homework, the children went for a walk．A.When they were doingB.After they have doneC.Having doneD.They had done

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C解析A项从句和主句句意矛盾；B项时态搭配有误；D项缺少连词；C项用现在分词表示和主语是主谓关系，并且此动作早于后面的动作，故是最佳
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