2014
高考英语阅读理解基础精品练习题（11）及答案 a (201*•全国卷，a) since 1984 ，philadelphia has been cleaning up its act. one by one，graffiticovered walls are being changed into outdoor art. so far，more than 1,800 murals (壁画) have been painted. philadelphia now has more murals than any other american city. the walls that were once ugly with graffiti (涂鸦) are now covered with beautiful pictures of historical heroes and modern art, thank
