书面表达
地球是我们人类共同的家园。“保护环境，人人有责”已成为当今时代旋律。目前，我校准备在师生中开展以“Save Our Earth”为题的英文征文活动。请根据以下三个方面的提示，写一篇80左右的短文。
1. 重要性：只有一个地球
2. 主要问题：污染（大气、水、土地及带来的疾病、灾难(disaster)等）
3. 措施：停止污染、保护大自然
注意：
1. 文章中不能出现真实人名
2. 文章标题已给出，不计入总词数
3. 可适当发挥，以使行文连贯
Save Our Earth
We all live in the earth.The earth is our home.We have only one earth.We must take care of it.Now,there are three main problems in our earth.They are pollution,disaster and illness.
It’s our duty to protect the environment.We must plant more trees,protect the flowers and grass and reduce the pollution.
It’s also our duty to keep our environment clean and tidy.If everyone tries his best to protect it,the earth will become much more beautiful.
