One possible version:

Nature is to us what water is to fish. Yet we don’t always realize it until it is too late. With the development of modern technology, there are more and more people on the earth and fewer and fewer resources left. What’s worse, pollution is getting more and more serious and the climate is becoming warmer and warmer. So we must do something to protect not only our next generation but also ourselves. As is shown in the pictures, we plant trees and we will enjoy the shade ourselves as well as our grandchildren. If we do something good to nature, it will do more to us.

题目分析：考查看图作文。本题的主题是人于自然和谐发展，刚开始的时候，人们善待自然，就如人们给小树浇水施肥一样，后来自然也善待人类，就如第二幅图一样。要求考生在保证内容要点全部概括的基础上可以充分发挥自己的想象，进而用自己的语言来表达某种观点或看法，增添了写作的灵活性，同时能较好地考查考生的想象能力和英语语言表达能力。

点评：看图作文要求考生将画面所包含的有效信息直接运用英语思维转换成英语语言文字，再根据这些要点谋篇布局。要求考生把看到的图画用文字表达出来，除了能表达清楚图画中的信息外，考生还需要根据词数要求，适当拓展并发挥想象，从而使文章的叙述不单调。如果是记叙文类的写作素材，考生要注意故事的时间、地点、人物、事件的起因、过程、结果这六个要素；如果是说明文或议论文，考生则首先要对图画的内容进行描述，然后围绕图画的信息进行说明或议论。此时考生一定要注意把握图画的中心思想，写出图画要反映的内容。