______first made Mark Twain known all over the country.

填空题During the Civil War Mark Twain became a river pilot.

单项选择题A．At a newspaper.B．At an advertising agency.C．At a furniture store.D．At a real estate offic

单项选择题A．Seeing a film.B．Diving in the sea.C．Having a class.D．Doing an experiment.

填空题Mark Twain seemed unhappy in his later years because his wife and______ had died.

填空题Mark Twain became the most outstanding writer of his time because he knew his people and the Mississippi River very well, and he inherited from his mother ______.