大学英语课后作文答案(新世纪综合教程4).doc

大学英语课后作文答案(新世纪综合教程4)
BOOK 4
Unit 1
My Understanding of Environmental Protection
Man and the environment are closely related. Man relies on the environment for water, food and shelter. A harmonious relationship between man and the environment is essential for human survival on the earth.
However, man and the environment have never been on such bad terms as they are now. As society develops, man's transformation of nature has severely polluted his living environment. Deforestation leads to changes in rainfall patterns, causing devastating floods, droughts and sandstorms. The discharge of chemical pollutants endangers our health and the lives of other beings. And mass production has resulted in the shortage of irreplaceable natural resources such as coal and oil. If we take no immediate and effective steps to protect our environment, human beings may be the next species to become extinct.
We should do our best to protect our environment by planting more trees, taking care of wildlife, reducing industrial wastes, using renewable energy, and imposing heavy fines on environmentally-unfriendly activities, so as to preserve the environment for future generations.

Unit 2
The Impact of the Mobile Phone on People's Lives
Among the many technological inventions, the mobile phone impresses me most.
The mobile phone brings considerable convenience to our lives. It not only enables us to keep in touch with each other almost anytime and anywhere but also helps us solve problems or do business efficiently. In emergencies, a mobile phone can even be a life-saver. Besides, its multi-functions add ease and color to our lives. With a mobile phone, we can receive mail, read news, listen to music, play games, and take pictures.
Yet, the mobile phone has its disadvantages, too. Most of us have experienced the nuisance of unwanted or wrong calls. We are inconvenienced by calls on occasions when we least expect one. Besides, the technology infrastructure to support mobile communication has consumed valuable natural resources and caused significant environmental problems. It is reported that electromagnetic radiation waves from the phone may result in health problems.
Despite its negative side, the advantages of the mobile phone outweigh its disadvantages. I believe that with advances in science and technology, improved and safer models of mobile phones will surely serve us still better.

Unit 3
Barriers to Knowledge Transfer
Knowledge transfer is a human phenomenon and plays a very important role in the process of human evolution. With the knowledge accumulated over generations, human beings can now build and transform societies with unprecedented knowledge resources.

However, there are many barriers to knowledge transfer. For example, lack of trust and resistance to change undermine the transfer of knowledge. People are less likely to acquire knowledge from those whom they don't trust or to adopt new theories and practices they are not familiar with. Cultural and language barriers also hamper the transfer of knowledge between nations or ethnic groups. It would be almost impossible for people who speak different languages or dialects with different cultural backgrounds to communicate effectively, not to mention exchanging knowledge.
An underdeveloped economy is another barrier to knowledge transfer. The lack of socio-economic and techno-environmental cooperation, as well as poor communications infrastructure, can greatly hinder the flow of knowledge within and between nations.
To remove these barriers, people should change their attitude towards knowledge transfer and the learning of foreign languages and cultures. At the same time, efforts should be made to develop a better world economy.

Unit 4
My Career Choice
When it comes to the choice of career, different people consider the matter from different perspectives. Personally I prefer to be a teacher.
I have three reasons for my decision. The first reason is that the profession of teaching is in agreement with my personality. Being an outgoing, patient and understanding person, I think I am able to communicate with my students and understand their feelings easily, which constitutes an important factor in ensuring success in teaching. The second reason is that I am interested in the job. It would always give me great joy and satisfaction to see the happy faces of my students, to share my knowledge and life experience with them and to participate in their process of growing up. The third reason is related to my occupational attitude. I always believe that school teachers all over the world are respected for their profound knowledge and higher social status. I have always held my teachers in respect and I hope I would be respected as a teacher, too, in the future.
I think teaching is an ideal career for me. Being a university student now, I will work hard to realize my dream.

Unit 5
Fame — Good or Evil
Fame has always been pursued by many people for the advantages it brings about. Fame can assure one of a high social status, high regard, great admiration, etc. Fame can also bring one wealth as a celebrity has more chances to earn big money. Besides, the applauses and flowers from the fans may boost one's self-confidence and increase one's sense of fulfillment.
However, fame can ruin one's life, too. It deprives one of his privacy. As a public figure, he is often chased by fans and journalists, and his private life never escapes the media's attention or public curiosity. Fame also places one under great pressure. He has to work in line with public expectations and thus becomes the slave of his own success.
So fame is a double-edged sword. I don't seek fame and I don't envy those who are famous. I highly appreciate what the American poet Henry Wadsworth Longfellow says about fame: "The talent of success is nothing more than doing well whatever you do without a thought of fame".

Unit 6
Attitudes Towards Life
People hold different attitudes towards life. Some take a positive attitude and they always appreciate the beauty of life with zeal and gratitude. Some take a negative attitude towards life and any slight trouble in life may seem like the end of the world to them.
A positive attitude ensures a happy, successful and healthy life. With a positive attitude, people find it easy to accept challenges and overcome obstacles while maintaining peace of mind. Besides, a positive attitude boosts their self-esteem, lifts their morale and helps them fulfill their commitments both in their career and in their everyday life. Moreover, medical research shows that positive thinking can improve the immune system and strengthen the body's resistance to diseases.
There are several ways to develop a positive attitude towards life. One needs to think positively, read uplifting stories, hang around with optimistic people, give up jealousy, and participate in meaningful activities. By building a positive attitude towards life, one can enjoy a happy, successful and healthy life.

Unit 7
Healthy Lifestyles
Different people have different interpretations of a healthy lifestyle. To me, a healthy lifestyle means living in a way that helps us to be physically, mentally and emotionally healthy.
We can benefit a lot from living a healthy lifestyle. On the one hand, a healthy lifestyle can help us to keep fit, increase our life expectancy, and help us form good living habits. On the other hand, a healthy lifestyle enhances self-esteem and confidence, reduces stress and pressure, and enables us to develop a positive outlook and live in harmony with each other. In short, a healthy lifestyle improves our overall sense of well-being and happiness.
There are many ways to develop a healthy lifestyle. We need to exercise regularly, keep a balanced diet, and avoid alcohol and cigarettes. It would also help if we could balance our time for work and play, and find ways to release stress and pressure. With such efforts, we will be able to live in a way that contributes to our physical, mental, and emotional health.

Unit 8
My Understanding of Honesty and Success
Different people have different opinions about the relationship between honesty and success.
Some people believe that honesty and success are mutually exclusive. They regard honesty as a wasteful and costly investment that will only hinder success and prevent people from quick wins. Money-making tricks such as low-quality and fake products, or practices like plagiarism and bribery are seen as short-cuts to immediate success.
However, many people hold that honesty and success are mutually supportive. They believe that honesty is the only means to an end. Being honest will definitely earn a person not only a good reputation but also more opportunities to develop his or her career and ability. Honesty also helps cultivate an upright and healthy personality and brings people true pride and deep joy.
I agree with the latter viewpoint. Honesty is a virtue that every one of us should value. It can bring out the best in a person and will give him or her the best reward in return. Those who are honest may suffer temporary losses sometimes, but they will benefit in the long run. In short, only by being honest consistently and persistently can we gain true and lasting success.