短文改错（共10小题；每小题1分，满分10分）
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。
Great changes have been taken place over the past five years in my hometown, that is a famous historic city. The streets used to be narrow, filling with small shops. Rubbish can be seen everywhere. Nowadays the streets are wider and clean with trees and flowers planted along the sidewalks. Besides, four new parks have been opened for the public and a number of high buildings has arisen in the city. However, some of the historic building have been torn down to make room for the high buildings. Our city now is modern and clean and it doesn’t have its own special characteristics. In my opinion, we should try to protect all the historic buildings in process of urban development.