看图，选用方框中的单词完成对话。

brother  grandfather  father  sister  grandmother

1. —Is she your mother?
    —No, she isn't. She is my ________.
2. —Is he his uncle?
    —No, he isn't. He is my ________. He is in Class One, Grade One.
3. —Is that your _______?
    —Yes, it is.
4. —Is she your friend?
    —No, she isn't. She is my ________.
5. —Is that Jack's uncle?
    —No, it's his _______.