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(Λ)，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。
Dear Joy,
How are you doing? Here is an exciting news for you. There will be an invention competition in our school in the 20th of October. However, there is a rule the participants shall be in a group. But I'd like to invite you to be my partners.
I know that you have been longed to design a tiny cooler that people can wear around the wrist. I think it will be a wonderfully idea for the competition. We can make a small air conditioner to controlling the temperature of the wearer.
How do you think of my suggestion? Looking forward to you reply.
