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 Toreturntotheproblemofwaterpollution,I'dlikeyoutolooka...

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 Toreturntotheproblemofwaterpollution,I'dlikeyoutolooka...

 To return to the problem of water pollution, I'd like you to look at a study _______ in Australia in ㊣2012

  A. being conducted        B. conducting   C. conducted    D. having conducted  

【回答】

C

知识点:非谓语动词

题型:选择题

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