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       ____.