试题题干
When Abraham Lincoln was elected president, the southern states broke away and formed a new nation called （）.
参考答案
正确答案：
试题解析
当亚伯拉罕·林肯当选总统时，南部各州脱离并组建了一个名为美利坚联众国的新国家。
When Abraham Lincoln was elected president, the southern states broke away and formed a new nation called （）.
当亚伯拉罕·林肯当选总统时，南部各州脱离并组建了一个名为美利坚联众国的新国家。