The problem referred to at the meeting, if in time , will have a bad effect on the environment.
A. not being dealt with
B. not dealing with
C. not dealt with
D. not to deal with
网友回答
A. not being dealt with
B. not dealing with
(答案→)C. not dealt with
D. not to deal with
解析：考查省略句：英语中主从句的主语一致时，可以省略从句的主语和be动词，if not dealt with= if the problem is not dealt with，句意是;如果会议上提出的问题没有被及时解决，会对环境有坏的影响。选C。