______so much pollution,it"s hard to clean the water of the

______so much pollution,it"s hard to clean the water of the It's hard to keep the house clean with tree kids .为什么不用clean there is so much water in the Atlantic that it is hard to im It ' s wasteful to ＿＿ clean water into the river . It's hard to resist the temptation of love to clean,ourturn,the classroom,it;s This factory is to blame for water pollution of the rivers.这 It's( )(help)of you to help me clean the classroom. 为什么“It's helpful of you to help me clean the classroom”为什么要用 The classroom is very dirty.it is hard to clean it和it is har 用英文回答what is the cause of water pollution? what factors influence the situation of water pollution?