一)证明
1) No one can deny the fact that ...
2) The idea i hardly upported by fact.
3) Unfortunately, none of the available data how ...
4) Recent tudie indicate that ...
5) There i ufficient evidence to how that ...
6) According to tatitic proved by ..., it can be een that ...
二)开篇
1) Many nation have been faced with the problem of ...
2) Recently the problem ha been brought into focu.
3) Recently the phenomenon ha become a heated topic.
4) Recently the iue ha aroued great concern among ...
5) Nowaday there i a growing concern over ...
6) Never in our hitory ha the idea that ... been o popular.
7) Faced with ..., quite a few people argue that ...
8) According to a recent urvey, ...
9) With the rapid development of ..., ...
三)结尾
1) From what ha been dicued above, we can draw the concluion that ...
2) It i high time that trict meaure were taken to top ...
3) It i neceary that tep hould be taken to ...
4) In concluion, it i imperative that ...