推荐一篇小编很喜欢的英语笑话，赶紧收藏吧。
One day a father was teaching his son and said, "The keys to your success are keeping your word and cleverness.
Once you promise somebody a promise, you must carry it out on matter what will happen. This is called ’keeping one’s word.’
"What is cleverness? asked his son.
"Cleverness is that you’ll never make such a promise, " the father answered.
