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。

The teenage year from 13 to 19 were the most difficult time for me. They were also the best and worse years in my life. At the first, I thought I knew everything and could make decisions by yourself. However, my parents didn't seem to think such. They always tell me what to do and how to do it. At one time, I even felt my parents couldn't understand me so I hoped I could be freely from them. I showed them I was independent by wear strange clothes. Now I am leaving home to college. At last, I will be onmy own, but I still want to have my parents to turn to whenever need help.

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文中共有10处语言错误，每句中最多有两处。错误涉及一个单词的增加、删除或修改。

删除：把多余的词用斜线（\）划掉。

增加：在缺词处加一个漏字符号（∧），并在该词下面写出该加的词。

修改：在错的词下划一横线，在该词下面写出修改后的词。

注意：1．每处错误及修改均仅限一词。

2．只允许修改10处，多者（从11处起）不计分。

One day a girl found a dead rat in front of her door. This kind of thing happens a lot of in the city during winter, but she didn't pay much attention to it. However, the next day it was a dead bird on the doorstep of its house. She thought it was just some jokes playing by those naughty kids. But the same thing happens for a week! She started to get angrily. So she set up a hidden camera on the door, tried to find out the truth, which really gave her big surprise. The criminal was a cat! It left those dead body in front of her house every day at midnight.

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。

    If you are on the street, you will see all kinds of people passing by. It's not rare to see people with bad manner. Some throw away rubbish casually. Some spits in public. Some even sit or lie on the ground, completely ignore others' feelings. People feel really badly about all these behaviors.

    To be honesty, smoking in public places makes me really annoying. As it is known to us all, smoking does harm for people's health. Not only is it bad for the smoker himself, but also it is threat to the public health. It was hoped that an effective way can be found to educate these people to behave well in public.

增加：在缺词处加一个漏字符号(∧), 并在此符号下面写出该加的词。

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。

    Mark Twain was born in a small town of Horid. When he is only twelve years old, his father died. Late, he became a river boat pilot. Mark Twain was her pen name. During the American Civil War, he worked as a reporter，travelling and write a lot of stories. Gradually, he made himself know and faced with great popularity. He became one of the best known writer of the 19th century in the U.S.A. In his life, Mark Twain wrote the number of stories and novels, which “Adventure of Tom Sawyer” is the most famous one. His writings have been translated to many other languages and they are deeply loved by the readers all over the world.

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：在错的词下画一横线，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。

Dear peter,

    I'm more than happy to hearing from you and grateful for your advices. As we know, a great number of students has improved their studies by taking part in weekend classes. And I won't do so, because of I think it's not suitable for me. Weekend classes often focus on lots of exercises and teachers give lessons at a fast speed. It's not good for a student like me who doesn't have a good command of basically knowledge. What's more, it will cost a lot of money if I took part in weekend classes, that will increase the economic burden of my parents.

    As for improve my study, I will change my learning method and pay more attention to the understanding of basic knowledge. If necessary, I will ask my classmates and teachers help me.

Yours sincerely,

Li Hua