1. do good to… 

　　be good for… 

　　do damage to…/damage sth.

　　2.  …has/have a lot of advantages over… 

　　…has/have the advantage of… 

　　3. benefit sb./sth. 

　　benefit from… 

　　4.be of great benefit to sb./sth.  

　　6. not so much… as… 

　　The reason for the rapid increase in population is not so much a rise in birth rate as a fall in death rate. 

　　7. There are some/two/many good reasons for…/to do… 

　　There are two reasons for the changes in people’s living conditions. First， we have been carrying out an opening and reform. policy. Second， our national economy is developing rapidly and the birth rate has been put under control. 

　　8. We have many good reasons for… 

　　9. The reasons for… are that… 

　　10. Different people have/hold different 

　　opinions/views/viewpoints/points of view/standpoints on this 

　　People differ in their opinions on the international cultural exchange. Some believe that international cultural exchange contributes to the friendship andars and has its own traditional culture， which is quite different from that in the western countries. Therefore， al. The international cultural exchange is of great importance now. People of all countries should understand each other and learn from each other to enhance the friendship among them. 

　　11. They are quite different from each other in their opinions. 

　　12. Some people hold the opinion that… 

　　13. As a result of all these factors， the government is becoming increasingly dependent on scientists for planning appropriate programs and putting them into effect. 

　　14. They differ greatly in their attitudes towards the affair. 

　　15. The reason for / cause of higher prices is an increase in demand. 

　　It is important (necessary， urgent， advisable， desirable， inevitable) that… 

　　16. have trouble/difficulty (in) doing… 

　　17.  An increase in demand causes/results in/leads to/produces higher prices. 

　　18. As/Since/In that/Now that the demand has increased， the prices are higher. 

　　19.It is important (necessary， urgent， advisable， desirable， inevitable) for sb. to do… 

　　20. The demand has increased， and as such， the prices are higher.