There are a cook and a dog in the kitchen in a dining room ，One day, the cook throws some meat not needed to that dog ，That dog thinks this cook's culinary skill very good ， will be thought highly of by the boss。
In a few days， the cook will throw the dog the spring onions that do not no ， please， it takes a sniff at， go away ， think his culinary skill very bad， will be dismissed by the boss。
Later， the cook's culinary skill was better and better， bosses thought highly of him very much， the dog has been driven away by the boss。