托福Toefl作文模拟题附范文 第42篇:21世纪的到来会产生怎样的变化

The twentieth century saw inventions and developments materialize that could scarcely be fathomed in the nineteenth. Computers, cars, airplanes, mobile phones, the Internet, microwaves, and the television were all products of the twentieth century. The twenty-first century will be yet another hundred years full of miraculous innovations. Here, I will discuss only three probable developments. First, the twenty-first century will see a dramatic increase in global communications through the expansion of cell phone applications. In particular, I envision a world in which all mobile phones will have video conferencing as a standard feature. So, instead of just hearing the caller on the other end, you will be able to see them as well. While this technology already exists for the affluent, I foresee that it will become much more affordable to the common man, and as a result communication worldwide will be quicker, clearer, and more effective. Imagine how communications between different cultures and languages will be improved when one can see as well as hear the other side. Secondly, I suspect that this next century will see the rise of renewable sources of energy for cars, airplanes, and transport mechanisms. Given that we currently use finite fossil fuels to power our transportation vehicles, we know that these will eventually dissipate. Thus, greater innovations will definitely appear to use wind, solar, and the natural biological processes to harness the power that we need. One particularly exciting innovation will be the spread of bio-diesel fuel in place of gasoline. Bio-diesel uses the natural energy of plants to drive cars and trucks. While bio-diesel is now in its embryonic phase of development, the potential for this source of renewable energy will undoubtedly be harnessed and expanded within the next century. A final development of the twenty-first century will be that space flight will become affordable. Currently, Russia has allowed “tourist” space flight to the ultra-wealthy, as two men who were not trained astronauts enjoyed the beauties from space. As engines become stronger and space less foreign, I predict that the prices for these services will decrease, allowing those outside of the most affluent to enjoy a ride to space and view the earth we all live on from a unique perspective. While I doubt that space flight will be available to the mass of humanity by the end of the twenty-first century, many more people will have this grand opportunity. In conclusion, numerous developments will happen in the 21st century. Three of these, I predict, will be increased global communications, wide-ranging innovations in renewable energy sources, and affordable space flight. Given the frenetic pace and creative minds at work, I probably have underestimated the pace and scale of future developments.