In England nobody under the age of eighteen is allowed to drink in a public bar． http://www.51education.net来自无忧英语教育幽默英语
Mr． Thompson used to go to a bar near his house quite often，but he never took his son，Tom，because he was too young． Then when Tom had his eighteenth birthday， Mr．Thompson took him to his usual bar for the first time．They drank for half an hour， and then Mr．Thompson said to his son，“Now， Tom，I want to teach you a useful lesson．You must always be careful not to drink too much． And how do you know when you've had enough？ Well， I'll tell you．Do you see those two lights at the end of the bar？ When they seem to have become four，you've had enough and should go home．”

“But， Dad，” said Tom，“I can only see one light at the end of the bar．”

在英国18以下的人是不允许到公共的酒吧喝酒。
汤普森先生经常到他家附近的酒吧喝酒，但是从来没有带过他儿子，汤姆，因为他还年轻，在他18岁生日的时候，汤普森先生第一次带他到经常去的酒吧。他们喝了半个小时，这时汤普森先生对他儿子说，“现在，汤姆，我想叫你一个常识，你必须注意不要喝的太多，那你怎么知道你喝的差不多了呢？这样，我告诉你，你看没有看见在这个酒吧的尽头，有两盏灯？当它们变成4盏的时候，你就足够了，应该回家了。”

“但是，爸爸，”汤姆说，“我只能看到一盏灯在酒吧的尽头。”