New ways have been found to prevent the river . A. not to be polluted B. against pollu——青夏教育精英家教网—

摘要： New ways have been found to prevent the river . A. not to be polluted B. against polluting C. from polluting D. from being polluted

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New ways have been found to prevent the river ______.

A. not to be polluted B. against polluting

C. from polluting D. from being polluted

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