7. 17th U.S. president Andrew Johnson never attended school. His future wife, Eliza McCardle, taught him to write at the age of 17.

• 美国第17任总统安德鲁-约翰逊从来没上过学。在他十七岁时，后来成为他太太的伊莱扎-麦克卡朵教他写作。