If you know a man's last name, address him as 'Mr.'.
如果你知道一个男性的姓, 应该用 'Mr。' 来称呼他。
No, more, about 130 years ago. Most of the slave owners were rich farmers who lived in the south. They wanted to keep their slaves.
不,还要早,大约130年前。大多数奴隶主都是住在南方的富有的农场主。他们想保留自己的奴隶。