题目内容：

用所给单词的适当形式填空，使短文内容完整通顺。

We can see many inventions around us every day. Some of the inventions 1.already 2. (change) our life and made our world more beautiful. Paper is a kind of useful invention. There was no paper for people to use a few thousand years ago. A lot of 3. (invent) in China wanted to find a new way for people to make a thing that could 4. (write) on. It must be cheap and light enough. A kind of paper has already been invented at the 5. (begin) of Han Dynasty, but it was too thin and soft, so most authors preferred 6. (use) the heavy bamboo rather than use this kind of paper.

At that time, there was a man 7. (call) Cai Lun. He was very familiar with the technique and then he made a new kind of paper which was based on that. This new kind of paper 8. (made) of wood, used cloth and something that was very cheap and quite easy to get. As a result, people now in the world 9. (be) still 10. (use) the paper which is made by the way that Cai Lun began to use.