Graffiti（涂鸦）
Street art is a very popular form of art that is spreading quickly (quick) all over the world. You can find it on buildings, sidewalks, street signs and dustbins in many big -1- (city) of the world. Street has gained great -2- (popular). Even art museums and galleries are -3- (collect) the works of street artists. Street art started out very -4- (secret) because it is illegal to paint public and private property without permission. People often have different -5- (opinion) about street art. Some think it is a crime and others think it is a very -6- (beauty) new form of culture.
Art experts claim that the -7- (move) in the New York City in the 1960s. Young adults -8- (spray) words and other images on the walls and trains. The -9- (color), energetic style of writing became -10- (know) as graffiti.
本题知识点：完形补文,
1） ______