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 Inallherlife,shedevotedherselfto

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问题详情:

 Inallherlife,shedevotedherselfto

 In all her life, she devoted herself to ________ our earth from ________.

A. prevent; polluting                        B. preventing; polluting 

C. preventing; being polluted                D. preventing; polluted

【回答】

C

知识点:非谓语动词

题型:选择题

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