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Topic 159 What change should be remembered?

The past 20th century has been a century of advances and developments: the emergence of the Internet and web technology. When I think of the 21st century, I am afraid to say that nothing but only bad come to my mind: overspreading epidemics, increasing religion conflicts and resources overusing.

The first thing that has hit my head is the overspreading diseases which modern medicine has nothing to overcome. For example, in Asia, there were hundreds of people who had a new disease called "SARS", a killer responsible for over one hundred people. In Hong Kong and Vietnam, the bird flu infected large numbers of poultry and caused children's death. In the United States, the west-Niles virus is feared among public since it transmits through mosquitoes. All of these diseases are new to human because of their rare genetic structure. Such diseases challenge modern medicine. However, there are only prevention but not cure.

Another thing that on everyday news is the religion-related terrorists activities. Even now the American-Iraq war has been tensioned in spite of the last's cease­fire. Some people say that this is a war between Christianity and Islamic, others insist that this a war aimed to oil power. As a result, innocent children and the public are sacrificed for those so-called "cause", meaning justice or security. It is hard for me to understand that how much human being have involved from animals, if we can only use force in this high technology time.

The last but not least thing that occurs to me is the concern of natural resources. Despite the fact that we are running out of available natural resources such as clean water, oil, and natural gas, our life is becoming more and more convenient, which means we will consume more energy than ever. This is also a vital problem for human's existing.

For the three factors I have mentioned above, I believe that there are some changes in this century, although I doubt whether those changes will lead us to happier future than now.

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Answers to All toefl Essay Questions

Topic 159 What change should be remembered?

Which invention was the greatest invention of the 20th century has been discussed many times. Different people have different views. Some think the greatest invention was television; some think it should be cars. But as far as I am concerned, the greatest invention of the 20th century would be computers. The reasons for my opinion are as follows.

First of all, computers save a great deal of efforts people spend on calculating. Before computers were invented, people had to calculate manually. Sometimes it took scientists weeks, even months to have a result. Of course, they might make mistakes during their calculation. That affected the accuracy of data. But with the help of computers, people are freed from heavy calculation. If only takes seconds to have a result which used to take weeks in the past.

Second, computers can simulate different environments that cannot be created in real life. In the science research, sometimes scientist need to have a simulation environment to improve their theories or as a basis of further research. Without computers it's difficult to have accurate and reliable results. But computers can make everything easy. Just input programs and data everything will be done.

The reason I think is becoming more and more important nowadays. That is computer is the way of access to the Internet. The Internet was developed based on the local area network (LAN) of computers. Today, the Internet has become the fastest developing medium in the world. You can find almost everything you need on the Internet, communicate with friends, read news, watch movies, listen to music etc. But you must do all the above things on a computer. Cannot log in the Internet means behind times today.

Although many other inventions of the 20th century brought great convenience to human or changed people's lives, computers have the most valuable contribution to human, and it will have much more contribution in the future.

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