假定英语课上老师要求同桌之间交换修改作文,请你修改你同桌写的作文, 文中共有10处语言错误,每句中最多有两处。错误涉及一个单词的增加,删除或修改。 
增加:在缺词处加一个漏字符号(^) ；
删除:把多余的词用斜线(/)划掉；
修改:在错的词下面划一横线,并在该词下面写出修改后的词。
注意：1. 每处错误及其修改均仅限一词；
2. 只允许修改10处，多者（从第11处起）不计分；
3. 改错在答题纸上做。
In England, nobody under 18 are allowed to drink in a bar. Mr. Thompson used to going to a bar near his house, or he never took his son, Tom, because he was too young.
Then when Tom had his eighteen birthday, Mr. Thompson took him to his usual bar. After drinking at half an hour, Mr. Thompson said to his son, “Tom, I want to teach you an useful lesson. You must always be careful never drink too much.”
“How do you know how you’ve had enough?” asked Tom.
“Do you see those two lights at the end of the bar? When it seem to have become four, you’ve had enough and should go to home.”
“But , Dad, I can see only one,” said Tom.