It seems to me that city governments should restrict the number of motorcycles allowed on the roads. This would limit the pollution they cause, but at the same time help to relieve traffic congestion. There should be a balance between the advantages and disadvantages of the motorcycle as a form of city transport.

26. Looking Forward to the 21st Century
 I am eagerly waiting the arrival of the 21st century, because it promises exciting new developments in science and technology. First of all, it is likely that telecommunications will expand by leaps and bounds. Secondly, more progress will be made in medicine, and thirdly the coming century will see mankind really come to grips with environmental pollution.
 As far as communications is concerned, e-mail and the Internet will probably become available all over the globe, enhancing mutual understanding and making wars less frequent. Advances in medicine will enable us to live longer and healthier lives, and science and technology will provide more tools for tackling the pollution problem.
 However, there will be new challenges to face in the new century. Population will continue to grow, putting pressure on the food supply. Moreover, there is a danger that people will become too dependent on machines to look after them, leading to a weakening of their spiritual lives.
 I intend to prepare myself for the 21st century by keeping abreast of the latest developments in science and technology. But at the same time, I will not neglect cultural pursuits.

27. Man Is to Survive
 The human race is facing problems which are getting more acute as time goes on. The most serious are shortages of resources, environmental pollution, and the pressure of population growth. In turn, these problems cause poverty, disease and wars.
 Pessimists say that the human race is facing extinction. This is because it is now too late to solve these problems, according to them. They predict that resources will become exhausted sooner or later, that pollution will eventually poison the planet, and that unchecked population growth will cause mass starvation.
 But I do not agree that mankind is doomed. In the past, the human race has always shown that it has the wisdom to overcome any threat to its survival. In the future, too, mankind will survive by using its wisdom to find a way out of its problems.

28. How to Succeed in a Job Interview?
It is undeniable that an interview plays a critical role in job-hunting. Through the interview, an employer can meet their future employees in person and know them more thoroughly. Sometimes the written form of examination cannot reveal candidates' real talents or problems. Besides, it is also beneficial for candidates to take an interview. They will have a chance to make their employers understand them better. ?
A number of factors contribute to the success in a job interview. Personally, I think job-hunters should pay attention to the following points. First, they should be well prepared professionally. That means they should be ready to answer all the important questions concerning their future job. Secondly, they should express themselves confidently and honestly. Last but not least, they should pay enough attention to their appearances, that is, they should be properly dressed.?