题目内容：

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。

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。

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。

For a long time I had been longed for a piano of my own to practice on. There was a piano shop on the street through that I went to the school every day. Whenever I passed the shop, look at the piano which stood in the corner of the shop window. What desperately I had been dreaming day and night to possess a piano like that. Unfortunate, my father was just a clerk, but he could not afford to buy me an expensive piano, though he knew that I was very anxious for one. In my birthday, I went as usual to the shop window to look at the piano, but to my surprised the piano had gone. In fact, I should not have been surprised, other had the right to buy it, if they could afford to. Tears filled my eyes when I thought of being able to see that piano any more.