跪求英语高手给几个四级考试作文的精彩百搭开头和结尾句！！！！拜托了！！！

1、 To solve this problem, a combined effort is really very necessary. First, factories should try all means to clean the polluted water and gas before such waste stuff flow into the river or emit into the air. Second, each government should make effective laws to punish various illegal conducts that are potentially harmful to the environment. Last but not the least, anyone of us has good reason to take actions for the restoration of the beauty of our globe.
2、 To eradicate this tumor of society, two measures might be involved/have to be taken immediately. For one thing, we should appeal to our government to make rigid laws to punish the briber and the bribed. For another, we ought to enhance their sense of serving people, not mastering people.
3、 To improve college entrance examination system, I suggest the following steps.
4、 The best way to solve this problem I think is to give young people opportunities to do things independently.
/5、 My suggestion is t