短文改错(共10小题；每小题1分，满分10分)
假定英语课上老师要求同桌之间交换修改作文，请您修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅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（∧），并在其下面写出该加的词。
删除：把多余的词用斜钱（\）划掉。
修改：在错的词下划一横线，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。
On my way to the bookstore, I noticed a group of people surrounded two anxious foreigners. I stopped and found that they were tourist from Canada who careless left a very important wallet in a taxi. I accompanied them to the nearest police station and without their help, we got in touch with the taxi company. We told a moment ago a driver had just turned in a wallet and then a policeman drive us to the company without delay. The two Canadians happily claimed their wallet, that contained their passports, flight tickets, some cash or credit cards. They expressed our thanks to me. I feel it is really a great pleasure to help the others.