问题补充:
We should think of ways to stop the waste from the factory our living environment.
A. being polluted
B. polluting
C. from being polluted
D. polluted
答案:
A. being polluted
(答案→)B. polluting
C. from being polluted
D. polluted
解析:
根据“废物”与“环境”的关系,“废物”污染“环境”,为主动发出的动作,故答案选B。