There are some health problems that, when in time, can bee bigger ones later onA.not treatedB.not being treatedC.not to be treatedD.not having been treated
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A解析试题分析:考查状语从句的省略:句意为:有些健康问题,如果不及时处理,以后会变得更严重。when not treated in time 为插入语,在本句中为时间状语从句,把that can bee bigger ones later on 这个定语从句给隔开了。when 引导时间状语从句时,可以出现省略的现象,但必须满足两个条件:首先,时间状语从句中的主语必须和主句主语一致;其次,从句中含有be 动词。本句中补充完整的状语从句为:when they are not treated in time,其它选项形式不对。故