单项选择题A．A bomb explosion.B．A traffic accident.C．Murder.D．Massaccres.

单项选择题A．An English reporter.B．An American reporter.C．An English scientist.D．An American scientist.

单项选择题A．From a newspaper advertisement.B．From a magazine article.C．From a television program.D．From an automobile dealer.

填空题______first made Mark Twain known all over the country.

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