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Cities have always attracted people from the countryside. They offer wider (1) choices for employment. They also provide a (2) better range of goods and services - shops, schools, hospitals- (3) and  a generally more exciting environment (4) for the sleepy village. However, cities have also been the (5) center of crime and poverty. But the attraction (6) that always remained and the movement, (7) of large cities is now stronger than (8) ever .One result (9) that industrialization has been the vast (10) increase in urban populations. By 1990, 40% of the world’s (11) population lived in cities, and in the developed (12) countries the figure was generally well (13) above half. This came about partly (14) as mechanized farming methods need only a (15) small part of the workforce to supply the (16) entire population. Another reason was the growth (17) of industry which was located in the (18) cities and employed huge numbers of people. (19) as  a result, cities are becoming bigger and (20) very crowded.