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

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。

    Last year,I went shopping in a department store.Little do I know that I was heading for a very new experience. While I was walking around the store,I happened to see the foreigner trying to explain herself with a salesman. Gathering her courage,I decided to step in and helped her explain herself.Fortunately,I could understand that she was talking about,so I just translated it into Chinese.

    I felt glad for able to help her and talk with her.She said that she was a student like me and was touring China lonely.She told me about some experience she had touring the country.Although I won't see her again,but it's good to meet someone like her from another country.

A、C+O₂ $\frac{\underset{\_}{点燃}}{}$ CO₂             B、2H₂+O₂ $\frac{\underset{\_}{点燃}}{}$ 2H₂O       C、2H₂O₂ $\frac{\underset{\_}{Mn{O}_2}}{}$ 2H₂O+O₂↑      D、____．

    Once there was a man named Chulong in Thailand. One day he saw a beautiful 1 when he was walking in the park. He went near it quietly and caught (抓住) it.

     " 2 do you catch me?" asked the bird.

    "I want to make money," said Chulong.

    "Nobody will 3 me because I'll lose my beauty when I'm not free." Then the beautiful bird turned into a common one.

    Chulong was unhappy.

    The bird said,“ 4 you set me free, I will tell you three simple but useful rules. I'm sure they will 5 you."

    "But how can I trust (相信) 6 ? You may fly away," said Chulong.

    "I won't," said the bird.

    Chulong set the bird free, and it sat in a tree.

    Now tell me the 7 ，said Chulong.

     “OK,” said the bird. "The first rule is never trust everything others say. The second rule is never be unhappy about 8 you don't have. The third rule is never throw away (扔掉） what you have in your hand'

    You silly bird "shouted Chulong ". Everyone knows these three rules. You cheated (欺骗）me.”

    But the bird said,"Chulong， 9 all your actions today. You had me in your hand but you threw me away. You trusted all I said. And you are unhappy about not having me. Although the rules are simple you never 10 them ". After saying this the bird flew away.