【正文】 on…　　6. therefore, these findings reveal the following information:　　7. thus, this is the reason why we must…　　8. to sum up …　　9. as far as…be concerned, I believe that…　　10. It is obvious that…　　11. There is little doubt that…　　12. There is no immediate solution to the problem of …, but …might be helpful　　13. None of the solutions is quite satisfactory. The problem should be examined in a new way.　　14. It is high time that we put considerable emphasis on… 　　15. Taking into account all these factors, we may safely reach the conclustion that… 　　11. To take …for an example…　　12. We have reason to believe that　　13. Now that we know that…　　14. Among the most convincing reasons given, one should be mentioned…　　15. The change in …largely results from the fact that　　16. There are several causes for this significant growth in…,first …,second …,finally…　　17. A number of factors could account for the development in…　　18. Perhaps the primary reason is…　　19. It is chiefly responsible of…　　20. The reasons for…are plicated, And probably they are found in the fact…　　21. Here are several possible reasons, excerpt that…　　22. Somebody believes/argues/holds/insists/thinks that…　　23. It is not simple to give the reason for this plicated phenomenon…　　24. Different people observes it in different ways. Others argue that... :Still others maintain that ...　　2) They are quite different from each other in their opinions.　　3) Some people hold the opinion that it is good to ....　　4) They think quite differently on this question.　　5) Opinions vary from individual to individual, from culture to culture.　　●表示必須,緊急,有困難做某事的句型:　　1) It is important (necessary, urgent, difficult, easy, convenient, fortable, expensive, desirable, advisable) for sb. to do sth.　　2) ...have trouble/difficulty/a hard time/a difficult time (in) doing sth. (有困難做某事)