14. Some cigarettes may even cost a larger sum of money.

　　改进: Some cigarettes may cost even more.

　　15. Firstly, dissatisfaction encourages the discovery of new products.

　　改进: Firstly, dissatisfaction encourages the invention of new products.

　　16. Insgroupsto suit the needs of enteringsintoswork, students must grasp some technical skills.

　　改进: Insgroupsto meet the needs of future work, students must learn some practical skills.

　　17. It is very necessary more qualified scientists and technicians.

　　改进: Qualified scientists and technicians are in great demand.

　　18. This knowledge will become a part of your body.

　　改进: This knowledge will become part of you.

　　19. They cannot think clearly.

　　改进: They cannot think straight.

　　20. Money can improve their living standard.

　　改进: Money can improve their life.

　　21. Parents always think that children will get a good job and earn a lot of money.

　　改进: Parents always expect their children to get a good job and earn a lot of money.

　　22. If a student only cares about money, will lead to be unhappy all his life.

　　改进: If a student only cares about money, he will be misled and will be unhappy all his life.

　　23. One purpose of education is to study the way in which he studies later.

　　改进: One purpose of education is to learn to learn.

　　24. Many parents arrange their children go to learn piano.

　　改进: Many parents send their children to piano classes.