1. It is certain that we have a long way to go。
2. To tell the truth , many mistakes we made could have been avoided。
3. 任何事物都是有两面性，……也不例外。它既有有利的一面，也有不利的一面。
4. It is a common saying that man who has a settled purpose will surely succeed.
5. As is known man is the product of labour.
6. As is known man is the product of labour。
7. It is a common saying that man who has a settled purpose will surely succeed。
8. It's hard to say whether the plan is practicable。
9. It seems certain that they have made a series of experiments。
10. It is said that bats have been using radar for millions of years。
11. 根据图表/数字/统计数字/表格中的百分比/图表/条形图/成形图可以看出……。很显然……，但是为什么呢?
12. It's hard to say whether the plan is practicable.
13. 俗话说(常言道)……，它是我们前辈的经历，但是，即使在今天，它在许多场合仍然适用。
14. In short, it can be said that……（总之，他的意思是……）
15. 现在，……，它们给我们的日常生活带来了许多危害。首先，……;其次，……。更为糟糕的是……。
16. It is clear that the enemy has no desire for peace.
17. All this shows that nothing can prevent us from reaching our aims。
18. It is (has been) estimated that the world's population could reach 6 billion by the end of the century.
19. It can be seen from this that there is no difficulty in the world we can overcome.
20. There is no doubt that (job-hopping)has its drawbacks as well as merits.（毫无疑问，跳槽有优点也有缺点）。
21. As to whether it is a blessing or a curse, however, people take different attitudes.
22. ……在我们的日常生活中起着越来越重要的作用，它给我们带来了许多好处，但同时也引发一些严重的问题。
23. Taking all these factors into consideration, we naturally/reasonably come to the conclusion that……（把所有的这些因素加以考虑，我们自然可以得出结论……）
24. It must be kept in mind that there is no secret of success but hard work。
25. As we know, it was not until recently that the problem was solved。
26. It must be pointed out that it is one of our basic State policies to control population growth while raising the quality of the population。
27. As far as we know, it took him more than a year to write the book。
28. 人类正面临着一个严重的问题……，这个问题变得越来越严重。
29. It must be admitted that you haven't done what you promised to do。
30. It is hard to imagine how Edison managed to work twenty hours each day。
31. As to whether it is worthwhile ......, there is a long-running controversial debate. It is quite natural that people from different backgrounds may have divergent attitudes towards it.
32. Along with the advance of the society more and more problems are brought to our attention, one of which is that....
33. It is clear that the enemy has no desire for peace。
35. In my opinion, this computer is different from that one you saw。
36. It is hard to imagine how Edison managed to work twenty hours each day.
37. 关于……人们的观点各不相同，一些人认为(说)……，在他们看来，……
38. There is no doubt that you will be helped by others if you have any difficulties.
39. As society develops, people are attaching much importance to....
40. 现在，……很普遍，许多人喜欢……，因为……，另外(而且)……。
41. ……已成为人的关注的热门话题，特别是在年青人当中，将引发激烈的辩论。
42. It must be kept in mind that there is no secret of success but hard work.
43. From what has been mentioned above, we can come to the conclusion that……（从上面提到的，我们可以得出结论……）
44. Hence/Therefore, we'd better come to the conclusion that……（因此，我们最好的出这样的结论……）
45. It has been proved that every substance, no matter what it is, is made up of atoms.
46. It is (has been) estimated that the world's population could reach 6 billion by the end of the century。
47. People are attaching more and more importance to the interview during job hunting
