题目内容
【题目】We had better pay attention to some health problems that, when ________ in time, can become bigger ones later on.
A. not treated B. not to be treated
C. not having been treated D. not being treated
【答案】A
【解析】
考查分词做状语。句意:我们最好注意一些健康问题,当这些健康问题没有被及时解决的时候,后来就可能成为了大问题。定语从句的主语that,也就是some health problems与动词treat构成被动关系,所以使用过去分词形式,否定式是在前面直接加not。本句也可以理解为是省略句,在when的后面省略了they are。所以A项正确。
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