假如你是李华，上周日你们班在学校附近的公园里组织了一次环保活动。根据下面的提示，写一篇英语短文简单描述这次活动，并谈谈你的感想。
写作提示：
1. 清理废纸、塑料袋等废弃物；
2. 树立标牌，告诉游客要爱护花草树木；
3. 宣传污染的危害及保护环境的重要性。
写作要求：
1. 词数 80 左右；
2. 根据要点提示，可适当发挥；
3. 文中不得出现真实姓名和校名。

Our class organized an environmental protection activity in the park near our school last Sunday. We did lots of helpful things in the park. First, we collected the rubbish, such as waste paper and plastic bags. Second, we set up several boards to ask the tourists to take good care of the flowers and trees. Finally, we gave a speech on the harm of pollution and the importance of protecting the environment.
I think it is everyone's duty to protect the environment. If we don't take action now, we'll have few comfortable places to stay in the future.

【分析】
这是一篇英语应用文写作题，要求描述一次环保活动并谈感想。解题思路：1. 确定时态：活动发生在上周日，用一般过去时；感想用一般现在时。2. 紧扣三个写作提示，用First、Second、Finally等衔接词串联内容，使结构清晰。3. 开头点明活动的时间、主体、地点，结尾加入个人感想，控制词数在80左右，适当发挥，避免出现真实姓名和校名。
【解析】
1. 开头：点明活动主体（our class）、时间（last Sunday）、地点（park near our school）及主题（environmental protection activity）。2. 活动内容：First对应清理废纸、塑料袋等垃圾；Second对应树立标牌呼吁爱护花草树木；Finally对应宣传污染危害和环保重要性，用衔接词使逻辑连贯。3. 感想：表达环保是每个人的责任，呼吁行动，升华主题，符合词数要求。
【答案】
Our class organized an environmental protection activity in the park near our school last Sunday. We did lots of helpful things in the park. First, we collected the rubbish, such as waste paper and plastic bags. Second, we set up several boards to ask the tourists to take good care of the flowers and trees. Finally, we gave a speech on the harm of pollution and the importance of protecting the environment.
I think it is everyone's duty to protect the environment. If we don't take action now, we'll have few comfortable places to stay in the future.
【知识点】
英语应用文写作、一般过去时运用、环保主题写作
【点评】
该作文紧扣写作提示，结构清晰，逻辑连贯，使用恰当的衔接词串联内容，语言简洁得体，符合词数要求，感想部分升华了环保主题，是一篇符合要求的优秀范文。
【难度系数】
0.5