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短文改错（共10小题；每小题1分，满分10分）
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限一词。&;
2. 只允许修改10处，多者（从第11处起）不计分。
Dear Mum,
This afternoon, our teacher asked us list what our parents had done for us. I write down a lot of good sides. Time passes quickly, isn’t it? It is three years when I became a high school student. Looking back on the progresses that I have made so far, I really appreciate for your support. I know that without your properly guidance, I would not have done so well.
However, what still makes me puzzling is how to make my dream to go to the top university come true. Please continue to lend I a hand. I really need your help.