第35题:[单选题]There are some health problems that, when__________ in time, can become bigger oneslater on. A.not treated B.not being treated C.not to be treated D.not have been treated 参考答案:A 本题考查非谓语动词及状语从句的省略。连词when之后为状语从句的省略,非谓语动词treat的逻辑主语即为主句主语health problems,它们之间的关系为被动关系,故选A。