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 Jack，
I'm sorry to hear that you feel lonely in the new school, because you find hard to make friends. Now, I'd like to offer you some advices. Firstly, it's normal of you to feel lonely because you are living in a new environment. Secondly, you should greet your classmates when met them on campus. Thirdly, it would be a good idea if you take an actively part in class activities, what can help them learn more about you. I believe you will be able to make new friends soon unless you're friendly to the others.
I hope the above suggestions will be helpful to you or everything will be fine with you in the future.
Yours，
Li Hua
组成无重复数字的五位数,则
相邻,而
不相邻的数有( )