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以下作文。作文中共有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：在缺词处加一个漏子符号（∧）并在其下面写出该加的词。
删除：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。
One day, little Tony went to a shopping center with his parents. It was very crowding. Tony saw a toy in a shop window. He liked it so very much that he quickly walked into the shop. After looked at the toy for some time, he turned around and found where his parents were missing. Tony was frightened and begun to cry. A woman saw him crying and telling him to wait outside a shop. Five minutes later, Tony saw parents. Mom said,“ How nice to see you again! Dad and I were terrible worried.”Tony promised her that this would never happened again.