17. Since cities have changed a lot, the size of the cities has grown enormously. Discuss the causes and consequence of the enormous size of cities.

　　18. Environmental problems are too big for individual countries and individual people to address. We have reached the stage where the only way to protect the environment is at an international level. To what extent do you agree or disagree with this statement? /或Damage to environment is an inevitable consequence of the improvement in the standard of living. To what degree do you agree or disagree to this position?

　　19. Nowadays there are various methods to relieve the pressure in modern life. Some read or exercise, others work in their gardens. What do you think are the best ways of reducing stress? 或There are different types of music in the world today. Why do we need music? Is the traditional music of a country more important than the international music that is heard everywhere nowadays?或Sports are very popular in today's society. Some people believe, "Winning is the only thing." Others believe, “It's not whether you win or lose, but how you play the game." Is there a way in sports in which both opponents could "win" a game? "Lose" a game? Detail your thoughts on this issue in an essay of about 250 words.

　　20.A lot of countries have schools that focus only on the males or females. What are the advantages and disadvantages of unisexual schools?

　　21. The development of science and technology benefit our life. However, scientists cannot find effective solutions to the problems they created. To what degree do you agree or disagree with this opinion? 或The typical teaching situation of a teacher and students will no exist in 2050, to what extent do you agree or disagree?

　　22. Some people believe that air travel should restricted because it cause serious pollution and uses up the world's fuel resources .To what extent do you agree or disagree?

　　23. Wild animals have no place in the 21st century. Some people think that preventing these wild animals from dying out is a waste of resource. To what extent do you agree or disagree with this opinion.

　　24. Some people think that children of different abilities should be educated together. Other people think that it's better to teach the intelligent children separately and with special treatment. What do you think?use your own ideas of knowledge and experience and support your arguments with examples and relevant evidence.

　　25. Writes an essay considering and assessing arguments for and against the following view: As reading is important for a good education, we should encourage our children to read whatever appeals to them.

　　26. Advertising is all around us, it is an unavoidable part of everyone?s life. Some people say that advertising is a positive part of our lives while others say it is negative. Discuss both views and give your own opinion. Give reasons for your answer and include any relevant examples from your own knowledge or experience.