仿照上面的短文，围绕我们身边的热门话题（如校服、线上课程、共享单车等），
简要阐述你的观点。

Now shared bikes are very popular in our city. They bring lots of convenience to our daily life. If you plan to take a short trip, you can easily find a shared bike and ride it to almost any place nearby. Riding shared bikes is not only good for the environment, but also a great way to build up our body.
However, some problems appear at the same time. Some people park bikes everywhere after using them, and even some people break the bikes on purpose. I think we should follow the rules to use shared bikes properly. If everyone can behave well, shared bikes will make our life much better.

本题为开放性观点阐述类写作题，符合八年级英语写作要求，解题步骤如下：
1. 选材：选取身边熟悉的热门话题，比如共享单车，贴近日常出行场景，有充足的内容可以展开。
2. 结构安排：①开篇引出话题，点明共享单车如今很受大家欢迎；②分点说明它的优势：出行便捷、低碳环保，还能起到锻炼身体的作用；③客观提出现存的小问题：部分车辆乱停乱放、有人故意损坏车辆；④最后给出自己的观点，呼吁大家文明使用，让共享单车更好地服务大众。
3. 全部选用八年级已学的词汇和基础句式，保证表达通顺、逻辑清晰，没有超纲内容。