One possible version:
As a student, what can we do to protect our environment? Well, we can’t throw rubbish here and there. If possible, we should walk or ride a bike instead of taking a taxi or a car, because cars and taxis make a lot of pollution. Don’t waste water or electricity and try to use fewer school things. Always use reusable cups, lunch boxes so that we can reduce waste. Also, we should care for flowers and trees and take an active part in planting trees. I believe if everyone protects our environment, it will become better.
试题分析：这是一篇给材料作文，题目和材料已经给出。我们要做的就是用正确的英语句子把这些内容表达出来。我们在写作中要注意认真审题，正确运用时态，多注意句式以及一些基本词汇及词组的应用。注意表达的条理性，连贯性，恰当应用连词。注意不要犯语法、句法以及搭配性错误，写好后多读多修改，写作中一定要使用自己有把握的句式单词。
【亮点说明】这篇短文使用了大量的的短语，可见该生英语功底扎实。.如we should walk or ride a bike instead of taking a taxi or a car，we should care for flowers and trees and take an active part in planting trees.As a student等，使文章的表达更丰富，更有逻辑性，更富有条理。
