填空题

Today, American filmmakers produce movies with few restraints about violence, sexuality and adult language. But this was not always the case.
The Motion Picture Association of America is the major movie organization that first formed in 1922. The organization helps (36) movies internationally, decides on (37) systems, and deals with public relations for the movie industry.
When it was first started by the Hollywood production (38) , the organization was called the Motion Picture Producers and Distributors of America. The group was (39) called the Hays Office because of its director, Will Hays. This group developed the Motion Picture Production Code in 1930. The aim was for the film industry and not the government to decide what was (40) acceptable to show in movies. The Hays Office (41) each film before it could receive permission to be (42) .
The production code was very clear about (43) including crimes and sex. For example, movies could not show violent killings, methods of stealing, or illegal drug use. (44) , scenes of childbirth and people not wearing clothing.
The Motion Picture Association finally ended the code in 1968 although movie makers had stopped following its rules many years before.
(45) . The ratings judge the level of violence, sexuality, and adult language.
When a movie is rated "NC 17", it means (46) .