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    【题目】 There are some health problems that, when ____ in time, can become bigger ones later on.

    A. not treated B. not being treated

    C. not to be treated D. not having been treated

    【答案】A

    【解析】

    试题分析：A；考查过去分词。句义：有一些健康问题，如果不及时治疗的话，后来很可能会成为乞丐把你的钱花光。关键词health problems“健康问题”和“治疗”之间的关系是被动关系，与done的进行式，将来式，完成式没关系，根据句意，故选A

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