假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加，删除或修改。每处错误及其修改均仅限一词；只允许修改10处，多者（从第11处起）不计分。

增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

    My grandfather is an old man, and he has always been happily. He likes travelling and has been to many places in China. Last month, he visits the Forbidden City which the emperors once lived. He even dreams of travelling to different foreign country one day. He thinks it is important try to understand as much about the world as possible. Therefore, he never left his hometown in his youth, because she had to work to support his family. He wanted to study for medicine, but he never got into an university. He hopes I can study hardly in the university and get a good job in the future.