how do we contribute to this issue?

how do we contribute to this issue? contribute to do 还是 contribute to doing? how do we go we,save,do,how,water? how do we go there? 谁能帮我写以How do dreaming and hard work contribute to success话题的2人英语对话 how the issue impacts water quality?how we contribute to this issue?还有how the issue affects us and other organisms? what shall we do?为什么不是 how shall we do? what shall we do?为什么不是 how shall we do? we have to be careful how we do this这句中 how we do this是什么成分? how do mutton we need much how much salt do we need how do we deal with our problems/ how much what do we need how many pages do we have left? O_____I do.How shall we celebrate. 《this is how we do it》歌词 how do we get to there改错