I am Lily. I am 6 years old. I have a best classmate in my class. Her name is Mary. She is 7 years old. We are in the same school. Mary's family are going to move(搬家) to Australia tomorrow. I feel very sad. I don't want to say goodbye to my best classmate. But I can't do anything. This morning, Mary tells me that she is going to see me in winter. I feel very happy. I can see her soon (不久). I know it's her birthday this summer. I will buy a big cake for her. At the same time, we will go to the zoo to see pandas.