根据所给中文意思完成句子，每空只填一个词。
最后年轻男子不得不让出座位。
At last the young man had to _______ ________ his seat.
咱们不喝咖啡喝茶吧。
Let’s drink tea _______ _______ coffee.
你们必须要沿着小路走。
You must _______ _____the path.
火车上都是人，我不得不站了六个多小时。
The train was ________ ________ people, and I had to stand for over six hours.
假如每个人都为保护环境做出自己的贡献，这个世界将变得更加美丽。
The world will become much more beautiful if everyone_______a contribution to________ the environment.