Onceairpollution　　　　inmostcities,itishard　　　　.A.rises;d...

问题详情：

Once air pollution　　　　in most cities, it is hard　　　　.

A. rises; dealing with　　          B. arouses; to be dealt with

C. raises; dealt with                   D. arises; to deal with

【回答】

D

知识点：非谓语动词

题型：选择题