分类：教育/科学-学习帮助
问题：高二英语选择题Thewaterisnotdrinkablewit 
The water is not drinkae without _________.A.further being treat   B.further treatingC.being further treated D.have further treated
回答：C.being further treated 
这里是被动，水被进一步处理， without 是介词后用ing形式