联系上下文,补全下列对话。
A: What's that 1.____ the wall (墙)?
B: It's my 2. photo!
A: 3. a nice photo!
B: 4. 5.______.
A: Who's 6.___ ?
B: She's my mother.
A: Is this 7.___ your father?
B: No, he's my uncle.
A: You are this little boy, 8._ think.
B: Yes, it's 9._____.