下面表格列出的是Peter所在的小组中同学们的家庭成员情况, 请根据表格的内容, 补全下面的短文解

　　

My name is Peter. Tim, Betty, Mary and Jackmy classmates. We are in the same class.

My father is a teacher, and myis a teacher, too. But Jack's father is a. Mary's father is a, but her mother has no job. Tim'sis a worker, and his mother is a doctor. Jack is young. He's. He has no brother or sister. is 13. Her sister's name is. Alice is a girl. She has a brother, and hisis Tim. Betty has no, and her brother's name is John.