An Essential Correction Teacher: Walter, why don't you wash your face? I can see what you had for 　     breakfast this morning. Walter: 　What was it? Teacher: Eggs. Walter: 　Wrong. That was yesterday. 老　师：沃尔特，你为什么不洗脸?我看得出你今天早饭吃了什么。沃尔特：我吃了什么？老　师：鸡蛋。沃尔特：错了，老师。那是昨天吃的。