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 friends,
In the past two weeks, all of us had a good time. We studied together, play together and did projects together, during it you helped us with our English studies. You often corrected our pronunciation and spell mistakes. Your jokes entertained them. Besides, your lecture on American life allowed us to know much about American culture and customs than before. Meanwhile, through different kind of sports and art activities, we have developed a strongly friendship with each other. Thanks with this chance, we have benefited a lot of from this exchange program. It really was unforgettable experience!
Thank you !
together and did projects together, during 
you helped us with our English studies. You often corrected our pronunciation and 
mistakes. Your jokes entertained 
. Besides, your lecture on American life allowed us to know 
about American culture and customs than before. Meanwhile, through different 
of sports and art activities, we have developed a 
friendship with each other.
this chance, we have benefited a lot 
from this exchange program. It really was