开头 with the development of the modern society, more and more..., some people hold that..., however, some others hold that...., in my view of point,......
.结尾 in sum, there is no denying the fact that......only in this way can we ......
此格式最适用于写议论文了，呵呵 希望对你能有所帮助。。
As we know....
这要看题目了
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