介绍全家 — 英语填空题

晚上，Tom 在家里给好朋友打电话，介绍自己的全家福。请根据句子的中文提示和括号内说明补全单词（每空一词，注意拼写）：1. This is my ___ . (奶奶) 2. This is my ___ . He is my father's father. 3. This is my ___ . She is my mother's daughter, but she is not me. 4. This is my ___ . He is my parents' son. (哥哥)