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 Tom,
I have heard that you were to come to our school as an exchange student. I, on the behalf of our class, welcome you warm. Now, I'd like to introduce some details about our class.
Our class is a very warm family. There are 50 students in our class, included 30 boys and 20 girls. You will find easy to join us since we all want to make friends with you. Whenever you get in trouble, you are ready to lend our hand to you. At last, I personally advice you to learn some basic Chinese to communicate with locally people. It is much easier for you to get on to teachers and classmates by speaking Chinese.
Yours,
Li Hua
