Read the passage and choose the best answer

Making a film takes a long time and is very hard work. Writing the story for the film may take many weeks. Filming the story, or shooting the film, often takes at least six months. Actors and cameramen work from very early in the morning until late at night. Each scene had to be acted and reacted, filmed and refilmed, until it is just right. Sometimes the same scene has to be acted twenty or thirty times.

   The film studio is like a large factory and the indoor stages are very big indeed. Scenery of all kinds is made in the studio; churches, castles and forests are all built of wood and cupboard. Several hundred people work together to make one film. Some of these people are actors and actresses. The director of the film, however, is the most important person in a studio. He decides how the scene should be filmed and how the actors should act.

   Most people go to see a film because they know the film stars in it. Sometimes the film may be very poor. It is best to choose a film made by a good director. Some famous directors make their film very real. People feel that they themselves are among the people in the film.

Some scenes have to be filmed many times because_______