1）There are three reasons for this.
2）The reasons for this are as follows.
3）The reason for this is obvious.
4）The reason for this is not far to seek.
5）The reason for this is that...
6）We have good reason to believe that...
There are three reasons for the changes that have taken place in our life. Firstly，people’s living standard has been greatly improved. Secondly，most people are well paid，and they can afford what they need or like. Last but not least，more and more people prefer to enjoy modern life.
注：如考生写第一个句子没有把握，可将其改写成两个句子。如：Great changes have taken place in our life. There are three reasons for this.这样写可以避免套用中的表达失误。
1）It has the following advantages.
2）It does us a lot of good.
3）It benefits us quite a lot.
4）It is beneficial to us.
5）It is of great benefit to us.
Books are like friends. They can help us know the world better，and they can open our minds and widen our horizons. Therefore，reading extensively is of great benefit to us.
1）It has more disadvantages than advantages.
2）It does us much harm.
3）It is harmful to us.
However，everything divides into two. Television can also be harmful to us. It can do harm to our health and make us lazy if we spend too much time watching television.
1）It is important（necessary，difficult，convenient， possible）for sb.to do sth.
2）We think it necessary to do sth.
3）It plays an important role in our life.
Computers are now being used everywhere，whether in the government，in schools or in business. Soon, computers will be found in every home，too. We have good reason to say that computers are playing an increasingly important role in our life and we have stepped into the Computer Age.
1）We should take some effective measures.
2）We should try our best to overcome（conquer）the difficulties.
3）We should do our utmost in doing sth.
4）We should solve the problems that we are confronted（faced）with.
The housing problem that we are confronted with is becoming more and more serious. Therefore，we must take some effective measures to solve it.
1）Some changes have taken place in the past five years.
2）A great change will certainly be produced in the world’s communications.
3）The computer has brought about many changes in education.
Some changes have taken place in people’s diet in the past five years. The major reasons for these changes are not far to seek. Nowadays，more and more people are switching from grain to meat for protein，and from fruit and vegetable to milk for vitamins.
1）We cannot ignore the fact that...
2）No one can deny the fact that...
3）There is no denying the fact that...
4）This is a phenomenon that many people are interested in.
5）However，that’s not the case.
We cannot ignore the fact that industrialization brings with it the problems of pollution. To solve these problems， we can start by educating the public about the hazards of pollution. The government on its part should also design stricter laws to promote a cleaner environment.
1）Compared with A，B...
2）I prefer to read rather than watch TV.
3）There is a striking contrast between them.
Compared with cars，bicycles have several advantages besides being affordable. Firstly，they do not consume natural resources of petroleum. Secondly，they do not cause the pollution problem. Last but not least，they contribute to people’s health by giving them due physical exercise.
1）It has increased（decreased）from...to...
2）The population in this city has now increased （decreased）to 800，000.
3）The output of July in this factory increased by 15％ compared with that of January.
With the improvement of the living standard，the proportion of people’s income spent on food has decreased while that spent on education has increased.
From the graph listed above，it can be seen that student use of computers has increased from an average of less than two hours per week in 1990 to 20 hours in 2000.
1）People have（take，adopt，assume）different attitudes towards sth.
2）People have different opinions on this problem.
3）People take different views of（on）the question.
4）Some people believe that...Others argue that...
People have different attitudes towards failure. Some believe that failure leads to success. Every failure they experience translates into a greater chance of success at their renewed endeavor. However，others are easily discouraged by failures and put themselves into the category of losers.
Do “lucky numbers really bring good luck？Different people have different views on it.
1）In short，it can be said that ...
2）It may be briefly summed up as follows.
3）From what has been mentioned above，we can come to the conclusion that ... 例如：
From what has been mentioned above，we can come to the conclusion that examination is necessary，however， its method should be improved.
1）It’s well known to us that ...
2）As is known to us，...
3）This is a topic that is being widely talked about.
4）From the graph（table，chart）listed above，it can be seen that ...
5）As a proverb says，“Where there is a will，there is a way.
As is well known to us，it is important for the students to know the world outside campus. The reason for this is obvious. Nowadays，the society is changing and developing rapidly，and the campus is no longer an “ivory tower. As college students，we must get in touch with the world outside the campus. Only in this way can we adapt ourselves to the society quickly after we graduate.
Does it pay to be honest？This is a topic that is being widely talked about and different people have different opinions on it.
The table shows (indicates) that a great number of people spent their holidays traveling abroad.
As we can see from the graph , the rate dropped slightly from 38% in 1993 to 31% in 2003.…
From the table we can find out that only 35% of the people have taken in physical activities.…
According to Chart I, the number was ten times as many as in 1995.
Compared with the boys, the girls show more interested in chatting.
The number of the boys playing games is much larger than that of the girls.
The number of...is equal to that of...
It doubled the number of last year.
It is clear from the chart that as incomes increase people can afford to live more comfortably and eat well.
As can be seen from the chart，only 10% of the time is taken up with sports activities.…
As is shown in the chart，the production last month rose so significantly…
As is described in the chart, the total number of visitors to the United States had nearly doubled to 2.7 million person by 1974.
After giving a careful consideration to the problem, I think I will be able to select the one who best fits the position.
Therefore, we need to educate our children, warning them of the dangers of playing with matches.
In conclusion, the upward trends suggest that more and more computer users will have access to Internet in the future.
In summary, smoking increased three different times and declined twice, with the last downward trend still continuing.
As is shown/indicated/illustrated by the figure/percentage in the table (graph/picture/pie/chart), _作文题目的议题_has been on rise (goes up/increases/drops/decreases), significantly/dramatically/ steadily rising/decreasing from_％ in _年_ to _％_ in _年_. From the sharp/marked decline/ rise in the chart, it goes without saying that __现象总结___.
There are at least two good reasons accounting for __. On the one hand, ____. On the other hand, ___ is due to the fact that __. In addition, __ is responsible for ___. (Maybe there are some other reasons to show ______. But it is generally believed that the above mentioned reasons are commonly convincing.
As far as I am concerned, I hold the point of view that _______. 再加上对策、口号。（ It’s high time that + 一般过去时）