9. The World Population Explosion
The human race has experienced a consistent increase in population since the beginning of its history. Famine and disease have done little to offset(抵消）this steady increase. Too many people are added annually to the population of the world. So both the causes of population increase and the results of having more people are worth careful study.
Culture evolution is the major factor responsible for population increase. Early in human development, people invented tools to hunt animals. Later they built shelters to protect themselves. Step by step, they made life easier. As a result, fewer died from natural forces, such as harsh climate and disease.
In the past, when population grew, there was unexplored territory to inhabit. But now, almost all the habitable land has been explored.
The worlds population may reach 8.7 billion in 2033. It is clear that world population is a serious issue that needs careful attention. Human beings are unique to solve problems through cultural evolution.(发展） Facing the world population explosion in the near future. We must carry out the birth control program in order to save the mankind and save the world.

10. Opening-door Policy is the Only Way to Make China StrongModern Chinese history leads us to the conclusion that socialism, not capitalism is best for China. But how a socialist China should look at capitalism and more importantly, make use of the better side of capitalism for its own advantage is of vital(至关） importance to the country.
As far as our countrys economic construction is concerned, taking advantage of the part of capitalism that is useful to us means we need to develop foreign trade, introduce advanced technology and better management, and make use of foreign funds. It also means we can absorb some of the economic theories, and make use of those economic policies, methods and measures that comply with(遵循） the law of mass production and a commodity economy.
By opening our windows wider to the outside world, people can learn more about other peoples and learn to make sensible judgments. Absorbing the better part of the cultures of other people to enrich ourselves is the best way to safeguard our socialist culture. So taking advantage of capitalism and stepping up economic reforms is the only way to make China strong. Closing the county to international exchanges will only keep it weak.

11. Choosing an Occupation
Every one faces the problem of choosing an occupation after graduation from college or university, which plays a vital role in his life. An appropriate occupation makes a man work with zest(热情） and vigor, as well as contribute to his country.
To make a wise choice, two important things should be taken into consideration. One is the interest, the other, the demands of people and society. Only if the two aspects are connected, can a man show his talent and ability to the best advantage. If the two conflict, the former should be under the latter, for the peoples interests are more important than the individuals.
In regard to my choice in the future, I am fond of learning foreign languages; what is more, with the implementation of the Open-Door Policy, exchange between home and abroad in economy and culture has been growing significantly, thus Im determined to be a qualified interpreter.

12. The Brain and the Computer
Some recent developments in the computer industry make scientists predict that the gap between human beings and machines will be closed about the year 20000.
To understand the significance of this prediction let us compare the human brain with existing computers. The brain consumes electrical energy at the rate of 25 watts and occupies a volume of one tenth of a cubic foot. The brain houses between 10 billion and 100 billion items of information. Every brain cell is directly connected to many other cells. As a result, the cells in which information is stored can communicate with thousands of other cells.
However, the computer consumes 1000,000 watts of electrical power and occupies hundreds of cubic feet of space. Its million items of immediately accessible information. In contrast, the computer memory is like a cell of pigeonholes, with no thinking capacity and no connections elsewhere.
In a word, the electronic brains are hopelessly inadequate in comparison with the human brains.

13. Health and Life
As the saying goes, you don’t know what happiness is until you lose it’ you don’t know what health is until you are ill. “Health is of vital importance to life” sounds like a cliche to everyone, but it is absolutely true.
The negligence of the delicate balance of your body and soul, the harmful habits such as smoking, excessive drinking and burning mid-night oil will catch up with you someday. How many big plans are interrupted by bad health! Even a normal life is unimaginable without the guarantee of health.
How to keep fit is an eternal topic of diversity and controversy. Regardless of all the different suggestions poured from all kinds of sources, one should do at least two things for him/herself. First, hold an active and optimistic attitude toward life and maintain a mental well-being. Second, live a regular life and keep a balanced diet. Anyway, a healthy life is within reach when you begin to adjust your mind and body.

14. Energy Resources
China is rich in various energy resources. Coal and petroleum, for instance, are two major ones. They are essential in developing the countrys industry, science and technology. China has done a great deal in the past few decades to raise its output of coal and petroleum.
Three energy resources are being used up rapidly, With the building of four modernization, new industrial and science projects are springing up like bamboo shoots after rain. They are all big consumers of energy resources. Besides there has been considerable waste in the utilization of these resources.
To avoid an energy crisis in the future, the government must take certain measures. First, it should let people know the importance of saving energy. Second, efforts should be made to develop new energy resources, such as solar energy, geothermal(地热） energy and so on. We have reason to be optimistic in this respect.

15. Competition
Competition makes people original and creative. It very necessary to compete if human society wants to advance. (Even animals compete for survival.) Without it, we would become lazy and nobody would rake any responsibility. When three monks live together, there will be no drinking water. This Chinese proverb vividly describes why Chinas productivity was so low before Mr Deng came to power. At that time, we had the so-called planned economy. There was no competition at all. So neither farmers nor workers worked hard. China was on the edge of collapse.
Competition can stimulate people to try their best to do anything. For example, in 100-meter race, each sportsman runs as quickly as possible, trying to win the champion. The same things happen in our society and in our daily life. If a company wants to surpass others, it must compete with them. It must raise its efficiency. All the companies doing this will no doubt benefit the whole society and the whole human race.
Being a student, I must compete with other students in our studies. I must study hard in all the fields so that I can be a useful man when I enter the society after graduation.

16.Students’ Part-time jobs
There are many advantages for a student to have a part time job. For instance, it helps him to realize that no success comes from nothing. It enables him to be independent and builds up his self-confidence. Therefore, part-time jobs can get the students out of the ivory tower and give them the opportunity to know more of himself and of his personal value in society.
As everything has two sides, the disadvantages can’t be ignored. Part-time jobs cut into students’ study time; some even become so preoccupied with making money that they ca ‘t focus their attention on studying. In the end, the students may fall behind or fail in their studies.
In my opinion, students can choose to take up a job according to their own situation. The most important thing is for him to keep a good balance, put his study on top of the list and assign an adequate amount of time to it.