According to the passage, what was the greatest benefit of cars to American life?
                    举一反三
- S5. According to the passage, what is the life of American young people like
 - According to this passage, the biggest change in American families is ______.
 - According to the passage, who has the greatest degree of control in the administered system?
 - According to the passage, the American identity is changing with the change in______
 - How does American society operate according to the passage?
 
