Text The modern urban planning and redevelopment movement【C1】______in response to the【C2】______and dirtiness of the slum areas【C3】______by the Industrial Revolution in the 19th century. Reformation of these areas was the【C4】______of early city planners, who imposed regulatory laws establishing【C5】______for housing, sanitation(卫生), water supply, sewage and public【C6】______conditions. Urban planners also introduced parks and playgrounds into crowded city neighbourhoods,【C7】______places for recreation, as well as【C8】______relief. The chief new urban-planning concept of the early 20th century was zoning--the regulation of building activity to set【C9】______of height and【C10】______and to protect established neighbourhoods. Urban territory【C11】______as a result of improved public transportation worker could live far from their jobs, traveling back and forth by bus, subway, or car. By the middle of the 20th century, urban planning changed its【C12】______. Planners realized that factors of city living must be considered as a whole, so they aimed less at attaching【C13】______problems than at the improvement of【C14】______urban surroundings. Another【C15】______of urban building【C16】______the building of experimental new towns and【C17】______. In Great Britain, India, Israel, and South America a few new cities were built entirely from plans. Urban planning was an important【C18】______in Europe after World War Ⅱ,【C19】______urban planners directed the reconstruction of【C20】______areas. 【C1】