What is Sinn Fein? What is IRA? When did Ireland become a republ

What is Sinn Fein? What is IRA? When did Ireland become a republic?
【正确答案】：(1)In 1918, a political group known as Sinn Fein established an independent Irish Parliament under its leader, Eamon de Valera.
(2) Irish Republican Army.
(3) In 1948, the Irish Free State left the British Commonwealth and became the Republic of Ireland.
【题目解析】：
参见教材P 347。