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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1816

Having suffered from serious pollutions, he made up his mind to devote his life to __________ pollution from __________ again.

A.preventing; happening
B.prevent; happen
C.preventing; happens
D.preventing; will happen
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Havingsufferedfromseriouspollu