补全对话.根据对话内容补全句子.
A:Hello,Lucy!
B:1.___________________________,Tom!
A:2.___________________________is that on the desk?
B:Oh,3.___________________________is a photo of my family.
A:Well,let me have a look.Are4.___________________________your parents?
B:Yes.And 5.__________________________is my sister.She's an English teacher.6.____________________________name is Ann.
A:I know you have a sister.Look here,is this boy your brother?
B:No,he 7.____________________.8._____________________is my cousin.