I. Read and fill in the missing words to complete the text. Modern graffiti began in big cities in the United States in (1)_______ 1970s. One of the first ‘taggers’ was a teenager called Demetrius. He wrote his tag TAKI 183 on walls and in subway stations in New York. Other (2)_______ saw Demetrius’s tag and started writing their own tags on walls, buses and subway trains all over New York. Then, some teenagers started writing their tags with aerosol paint. Their tags were bigger (3)_______ more colourful. Aerosol paint graffiti (4)_______ very popular in the 1970s and 1980s and appearedon trains, buses and walls (5)_______ the world. In the 1990s and 2000s, a lot of (6)_______ artists started painting pictures. In some countries, writing or painting on walls is a crime and street artists can have problems (7)_______ the police. In (8)_______ countries, artists can draw and paint in certain places. For (9)_______ , in Taiwan, there are ‘graffiti zones’ where artists can paint on walls. In São Paulo in Brazil, street artists can paint pictures on walls and houses. (10)_______ pictures are colourful and beautiful. Some tourists visit São Paulo just to see the street art!