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

問題詳情：

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

知識點：非謂語動詞

題型：選擇題