二、中間段
1.The change in……Mainly results from……
2.The increase in……Is due to the fact that……
3.Many people would claim that……
4.One of the reasons given for……is that……What is also worth noticing is that……
5.There are a variety of reasons for this dramatic growth in……First……Second……Finally……
6.There is no evidence to suggest that……
7.Why are (is/do/did)……? For one thing……For another……
8.There are numerous reasons why……, and I shall here explore only a few of the most important ones.
9.It will exert remarkable effect on……
10.A multitude of factors could account for (contribute to.the change in……
11.With the development of……, vast changes awaits this country society.
12.History is filled with the examples of……
13.The story is not rare (isolated/unique), it is one of many examples.
14.As is shown in the table released by the government, it can be learned that……
15.There is (no.good evidence to……
16.We must admit the undeniable fact that……
17.No one can deny (brush aside.the fact that……
18.Experience (Evidence.suggests that……
19.The same is true of……
20.As the saying goes……