问题补充:
It is reported that the water in the river is becoming worse and worse, the river around the city with waste from factories.
A. polluting
B. polluted
C. having polluted
D. to pollute
答案:
A. polluting
(答案→)B. polluted
C. having polluted
D. to pollute
解析:本题考查非谓语动词。the city与pollute关系为被动关系,故用过去分词作定语,选B。