1. In conclusion, people around the world should protect the water resources.总之，全世界的人都应当保护水资源。in conclusion总之2. Our class came up with the idea to make better use of used materials.我们班的同学提出了这一想法，以更好利用废旧材料。come up with提出；make (good) use of(充分) 利用3. Last but not least, we should make good use of water in our daily life.最后但同样重要的是，我们日常生活中应该充分利用水。last but not least最后但同样重要的是4. As far as Im concerned, riding bicycles is a good solution to air pollution. 就我个人而言，骑自行车是一个解
