十一、书面表达。
请根据所给海报写一篇小短文，呼吁同学们行动起来，让我们的城市保持干净、美丽。
要求：可适当发挥想象，不少于50个词。

Better city，better life

Better city, better life
Dear classmates,
To keep our city clean and beautiful, we should try our best to do something. First, we mustn't litter anywhere. We should always put rubbish into the bin. Second, we can walk or ride bikes to school. We can also take buses or trains when we go out, which can reduce pollution. Third, we need to love and protect trees and flowers. We can even plant more trees in our free time.
Let's take action right now! Our city will become nicer and nicer.

本题为倡议类书面表达，需结合图中提示的环保行为（不随地乱扔垃圾、步行/骑行上学、选择公共交通、爱护花草树木等），运用六年级上册所学的情态动词should/shouldn't、祈使句等句式，围绕“让城市干净美丽”的主题组织语言，保证语句通顺、逻辑合理，且字数不少于50词。