Test5 The Mass Urbanization of the World’s Population I. Reasons A. the (1) reason new jobs are in or around major cities B. the quality of life issues: (2) better schools (3) , shops, and places of entertainment II.Three key changes A.Cities are getting bigger and bigger. more people living in urban areas more (4) B. Cities are changing their shapes. (5) buildings (6) : a symbol of modern cities C. Cities are breaking up into smaller (7) . people do not (8) with others from different backgrounds III. Problems Cities don’t always offer the economic security, the safety, or the comfort they promise. (9) or ghettos in many cities problems of (10) , crowdedness, and poverty