短文改错 (共10小题; 每小题1分, 满分10分)
假如英语课上老师要求同学们交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，要求你在错误的地方增加、删除或修改某个单词。
增加：在缺词处加出加一个漏字（^），并在其下面写上该加的词。
删除：把多余的词用斜线（\）划掉。
修改：在错的词下划一横线，并在该词下面写上修改后的词。
注意： 1. 每处错误及其修改均仅限一词；
2．只允许修改10处，多者(从第11处起)不计分。
As the world enters the 21st century, the development in the science and technology will bring us much more hopes and chances we’ve never imagined before. People are hoping have  a peacefully and highly developed world. To catch up with the new development and to be success in the new century the young generation is required to have different kind of skills and abilities, such like the computer science and the English language. Otherwise one will be left behind. Young people would study even hard at school and prepare for themselves mentally and physically to meet the challenge of the new century.