Toreturntotheproblemofwaterpollution,I'dlikeyoutolooka...
来源：语文精选馆 2.3W
问题详情：
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
