Something must be done to prevent our city by thick smoke.A. to be polluted B. from poll

发布时间：2020-08-16 07:58:46

Something must be done to prevent our city      by thick smoke.
A. to be polluted
B. from polluting
C. from being polluted
D. polluting

网友回答

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