2008年12月英语四级作文真题:一次性塑料袋

The most convenient thing in our life is the plastic bag. It can be used to hold food, water and many other things. It is also called convenient bag, but it is made up of a pile of polyethylene which we don't know anything about. It is a kind of white pollution to the environment. Although it is so convenient, as a contemporary college student, we should avoid using plastic bags. Only in this way can we contribute to the environmental protection of our country.There is only one natural constant on earth, so we should contribute our own strength, starting from bit by bit, starting from small things.Do not think that plastic bags are small things to do, accumulate more, so as to better protect our country. Blue sky is blue sky, blue sky is home, blue sky is our arm.