KeepingWaterSourcesClean(保持水源清洁) 　　KeepingWaterSourcesClean 　　Whoiswillingtodrinkthepollutedwater?Itcancauseustobeillandeventodie.Wecan'twaitforamomenttoprotectourwatersources.Thewaterweusecomesfromoceans,lakes,riversorstreams.Butmanyofthesewatersourcesaregettingseriouslypolluted.Townsandcitiesarepouringdustintothewater.Manypeoplearethrowingallkindsofdirtythingsintothewater.Factoriesarepouringwastematerialintothewater.Therefore,watersourceshavebecomesobadlypollutedthatsomeofthewaterisunfittodrinkortouse.Nowitishightimethatweshoulddosomethingtoprotectourwaterenvironmentfrombeingpolluted. 　　保持水源清洁 　　污染的水会使人生病甚至死亡,有谁愿意喝这样的水呢?我们要保护水源,刻不容缓.我们用的水来自海洋、湖泊、河流或小溪,但这些水源有许多正受到严重的污染.城镇乒把大量的尘埃排入水中,许多人正把各种；各样的脏物投进水中,工厂正把废物排入水中.因此,水源已经污染严重,其中一些不适合再饮用.现在到了．采取措施保护水环境使其免受污染的时候了.