The Leatherstocking Tales, which included The Pioneers, The Last of the Mohicans, The Prairie, The Pathfinder and the Deerslayer, were written by _____________.

单项选择题The Lost Generation which Gertrude Stein used to describe such writers as Dos Passos, Ernest Hemingway and F. S. Fitzgerald refers to the ______________.

单项选择题The only American president elected for a third term is ____________.