提示：根据中文意思和英文提示词语，写出意思连贯、符合逻辑的英文文段。所给英文提示词语必须全部使用；根据每组英文提示所写出的句数不限。所给内容如下：北京是一座美丽的现代化城市，到处是高楼大厦和干净的街道。我们应该保持周围环境的整洁……，我们不应该……

1．beautiful, modern, city

2．there be, tall building, clean street, everywhere, Beijing

3．environment, plant, as many, flower and tree, as possible, protect, them

4．throw waste, here and there, because, every one of us, hope, live, a wonderful environment