There are some health problems that , when in time , can bee bigger ones later on.
A. not treated
B. not having treated
C. not to be treated
D. not having been treated
网友回答
(答案→)A. not treated
B. not having treated
C. not to be treated
D. not having been treated
解析：
试题分析: 考查非谓语动词。从句子结构可知动词treat和逻辑主语health problems之间是被动关系，而且是指普遍性情况，所以答案选A。句意：有一些健康问题，当不被及时治疗时，以后可能会成为大问题。