关于world400的作文知识

It’sourdutytoprotecttheenvironment.Ithinkweshouldkeepourschoolsandcitiescleanandtidy.Herearesomeofmyviews：Don’tspitinpublicandthrowrubbisheverywhereweshouldplanttreesandflowersaroundthecity.It’simpo...