These rivers should be prevented .A. to be pollutedB. from being pollutedC. pollutingD. be

发布时间：2020-08-16 08:37:06


These rivers should be prevented     .
A. to be polluted
B. from being polluted
C. polluting
D. being polluted

网友回答

A. to be polluted
(答案→)B. from being polluted
C. polluting
D. being polluted
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