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限一词。
2. 只允许修改10处，多者（从第11处起）不计分。
I will spend the summer holiday in the country next year. Although the city is modern and convenience, there are still some problem, such as air pollution and noise. In the country, I can enjoy a comfortable and quiet life. There, the air was fresh and the water is clean. Trees are green and birds are sung. I can also go boating, fishing and swimming in the lake. What’s most, I can climb the hills. All this will be interested and good for your health. Above all, I can go back to the nature. But I want to go to the country a change. I’m looking forward to my summer holiday.