问题
选择题
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
答案：A
题目分析：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。