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。
Dear Jin Jing，
Your puzzle is common problem among middle school students．Maybe the following advices can help you．First in all，believe in yourself．Your greatest problem is that you lack self-confidence．The first thing you must do it is to smile at your classmates．One smile speaks loud about your wish to make friends than any word．Your smile will show that you are friendly to him．Next，trying talking with a student who is as shy as you or who share the same interest as you．You can discuss your studies with a classmate and you can also talk about your hobbies, Unless anyone is in trouble，you should be ready to help him or her．Once you have confidence，you can make as many friends as possibly．
Yours，
Lily