题目

阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。选项中有两项为多余选项。Paper waste is a major contribution to the total waste at landfills. Over two million trees are cut down for global paper consumption every day. This article will teach you some ways to reduce paper waste.Write on both sides of the paper. It may seem as if simply writing on both sides of the paper is not helpful. The back of a piece of paper can be used for other purposes. If you don't want to do this right away, consider keeping a box of the paper that you've only used摆一摆，算一算