下面是修改后的习作：

Once in a newspaper, I hit upon a news cartoon of one hen and three cocks. (这句有些罗嗦，可以直接描述图画) The eggs, which had just been produced laid by the hen, were critically described by the cocks as substandard, uncharacterized and color-boring. Just as the cocks were talking excitedly, the hen was sitting there without a word, looking after her dear babies.

The hen and the cocks stand for two classes of people. People there in the first class are belonging to the 'DOs', while the one in the second-class counterpart belongs to the 'DON'Ts'. The only habit of the 'DON'Ts' people is to laugh at other men's achievements. The only thing that they eagerly love to do is to poor a stream strain of ugly impolite words on all successful results, especially the 'eggs' of the 'DO' person. So, it is these people there are the talking ones, that hit the confidence of others dent other people’s faith and even, sometimes, decrease the developing pace of social civilization of the country.

Therefore, we, the whole society, must bring out（最好用 lay down 语气强烈） some tough measures to make such phenomenon stop becoming worse to shield the phenomenon from deterioation. Firstly, we must pay attention to our own behavior, but not to critise hypercriticize other people's work unnecessarily（补充we must…but…可以使句子更完整，补充unnecessarily则使句意更加明确，不是要反对所有的批评，而是反对不必要的批评）. What's more, the public medias mediums have the responsibility to cleanse purify the social circumstance atmosphere（表示社会环境要用 social atmosphere）. If only the 'DON'Ts' people have truly disappeared in our society can we really enjoy our undisturbing undisturbed life. When those people of negative attitude have finally disappeared from our society will we truly enjoy an undisturbed life.(划线句子替换成这个句子，表达更加流畅)