There are many features that (1)_____ a movie as American, but perhaps the most (2)_____ is the theme of the loner-hero(孤胆英雄). In the western movie, which comes out of many (3)_____ of the American West, a typical figure is the lonesome cowboy. He wanders into a town and (4)_____ out its troubles. Then the strong and independent hero rides off into the sunset (5)_____. Americans like this (6)_____ in their films because they are (7)_____ independent, and individualism (8)_____ a great deal with them. An individual, who is able to (9)_____ the evils of the world, or of a small town, is someone to admire. Even the gangster movie, a very popular (10)_____ of the typical American film, usually has a hero. (11)_____ he is a lawman out to catch the criminals or a gangster who suddenly sees the light and tries to go (12)_____ During the violence-ridden period of Prohibition in the 1920s, the gangster movie (13)_____ in popularity. These films kept the same. (14)_____ as the western—the bad cannot triumph. One good person can save the innocent. Recent science fiction films deal (15)_____ the same theme. Against the forces of the alien powers, people will fight to protect their ideals. Here, too, the action (16)_____ around a single individual, (17)_____ now he or she must save the world. The hero battles the unknown, trusting in inner capabilities and in the power of good (18)_____ evil. Fearless, the hero of a typical American movie does not (19)_____ to jump into the action. This dominant theme of the American movie is familiar (20)_____ people around the world.