8. It is hard to imagine how Edison managed to work twenty hours each day.
9. It's hard to say whether the plan is practicable.
10. There is no doubt that you will be helped by others if you have any difficulties.
11. It seems certain that they have made a series of experiments.
12. It is said that bats have been using radar for millions of years.
13. To tell the truth , many mistakes we made could have been avoided.
14. As we know, it was not until recently that the problem was solved.
15. It must be admitted that you haven't done what you promised to do.
16. In my opinion, this computer is different from that one you saw.
17. It is certain that we have a long way to go.
18. All this shows that nothing can prevent us from reaching our aims.
19. As far as we know, it took him more than a year to write the book.
20. It has been proved that every substance, no matter what it is, is made up of atoms.
21. It has been decided that we are going to build a railway whose base must be completed within this year.
22. It is obvious (evident) that the success of the innovation depends on our concerted efforts.
23. To be frank, whether you like it or not, you have no other choice.
24. It is natural that one may have trouble expressing complicated ideas in simple English.
25. What is more important, the agreement they have negotiated is being carried out.
26. We will be successful as long as we persevere.
27. Frankly speaking, what you call the truth may not apply to things happening here.
28. It is true that we must redouble our efforts; otherwise we cannot catch up with the developed countries.
29. I take it for granted that they will support this idea.
I regard it as natural that they will agree to this idea.
30. In a certain sense, a successful scientist is a person who is never satisfied with what he has
achieved.
31. The oceans do not so much divide the world as unite it.
32. There is no denying the fact that the new management method has greatly increased the production.
33. There is no denying the fact that the new management method has greatly increased the production.
34. Upon hearing the unexpected news, he was so surprised that he couldn't utter a word.
35. As the saying goes, nothing in the world is difficult for one who sets his mind to it.
36. Our goal must be attained. Our goal can unquestionably be attained.
37. Noting can prevent us from realizing the four modernizations.
38. Now in China, more and more families can afford to buy high-grade goods, such as washing machines, TV sets, videocorders.录像机
39. No matter how difficult English may be, you should do your best to learn it.
40. It can be said that without knowledge of science and technology, it is impossible to build socialist modernizations.
考研作文的最主要的特点就是以议论为主。其实，考试作文是最容易写的一种作文形式（这不包括英语专业考试的作文），它不要求写得很有文采，它最追求的就是要写得脉络清晰，富有条理。考试作文的指针就是：取悦阅卷者，充分考虑阅卷者的心理。为了达到这个目的。建议考研作文采取格式作文的形式
第一步，就是要采取四段式来写作文，第一段阐明主旨，二、三段分别叙述，最后一段再进行总结。每一段的起始句很重要，建议第一段的起始句采取长句的形式，而后面的段落的起始句用一些特定的显示层次的词和词组来修饰也很重要。如“first,second,third""first of all ,secondly,in the final analysis"等等，这样能使段与段之间的联系更加紧密。对于进行详细阐述的二、三段，建议每一段举上一两个实例，以避免给阅卷者言之无物的印象。另外，二三段的每一段的结尾应该对该段的中心思想再进行一个简要的概括，分别用一个句子即可，这样做的好处就是使阅卷者对你文章的条理性有一个更深刻的认识。最后一段照应第一段，再进行一个大意上的概括，当然，应该用另外一种语句，并在中心思想的基础上做一定的拓展。