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    【题目】__________ out of work for a few months, mother took up the job of waiting on patients in the hospital.

    A. To be B. Being C. Having been D. Having

    【答案】C

    【解析】句意：母亲已经失业好几个月了，她开始在医院里做照顾病人的工作。句意决定了要用现在分词的完成式表示分词的动作be out of work 发生在谓语动词took up 之前，再根据句中的时间状语for a few months 可判断出选C项。

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