1. The harder you work at it, the more progress you will make.
你工作越努力，你取得的进步就越大。
2. If everyone makes a contribution to protecting the environment, the world will become much more beautiful.
如果每个人都为保护环境做出贡献，世界会变得更加美好
3. The reason why people choose to live in the city is that the life is more convenient and colorful.
人们为什么选择生活在城市的原因是因为城市的生活更方便、更多彩。
