【正确答案】
When speaking of great inventions and discoveries in the last century, I can say, the invention of Internet is the most important. Internet plays a role in our work and daily life so significant that people regard it as an indispensable partner. The following examples can prove this point of view.
First of all, when we'd like to obtain some information in a certain field in the past, we had to spend a great deal of time to consult many people and refer to a lot of books. However, Internet makes it relaxable and easy. In just a few seconds, the information you need appears on the web page. In addition, comparing with the traditional letter, Internet creates a quick and convenient method for us to communicate. It really shortens the distance of the whole world that can be named as earth village. No matter what we do, Internet provides us the most effective and useful means of communication.
In conclusion, people can't imagine what it is like without Internet nowadays, especially to some people who engage in electronic business. What we should do is to further improve Internet's function and make it serve human being better.

【答案解析】[解析] 这是一篇要求叙述过去一百年里最伟大的发明的作文。第一段可以先阐述自己认为的最伟大的发明是什么，第二段可以集中举出一些实例来证明自己的观点。第三段为自己的观点作出总结。