小朋友,请你选择正确的答案,将序号填在括号里。 ①brother ②grandmother ③uncle ④cousin ⑤father ( )1. He's my grandfather's son, but not my uncle. He's my . ( )2. He's my mother's son. He's my . ( )3. She's my mother's mother. She's my__ ___. ( )4. He's my father's brother. He's my ____. ( )5. She's my aunt's daughter. She's my ____.