补全对话（英语）：如下：
A:Hi,this is a photo of my ___.
B:Oh!___ these your___?
A:___.They are my grandparents.These are my ___.
This is my father.___ name is Nick.And this is my
___.Her name is Linda.
B:So,is this your grandfather
A:Yes,___ is .His name is Bill .And these are my cousins.They are students.
B:Is that your ___?
A:No,that is my aunt .___ name is Mary.This is my sister Alan.