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There are some health problems that, when ______ in time, can become bigger ones later on.
A.not treatedB.not being treatedC.not to be treatedD.not having been treated
A

试题分析:考查状语从句的省略句:句意:有很多健康问题,如果得不到及时处理的话可能会变得很糟糕。此处非谓语动词做条件状语,其逻辑主语是health problems,被动关系,一般式,相当于when they are not treated in time。当主从句的主语一致的时候,可以省略从句的主语和be动词。选A。
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