Ba's class has a (1)....discussion... on waste paper. His friends are so (2).surprised.......... to learn that every day throughout the world, millions of newspapers and paper bags are screwed and (3)thrown.......... away. People are collecting waste paper and (4)...recycling.......it. Making paper (5).requires.......... a lot of trees and labor. Now if people don't (6).preserved........ papers,they can save(7)..labor........and money.Especially, people can save the natural (8)...resources......... For every (9)....ton......of recycled newsprint, ten trees can be saved. The more paper people save,the more natural resources are(10).....waste........