选择合适的句子，补全对话。

A. What are these on the desk? B. He likes sports (运动) very much. C. Come in, please. D. No, he is my grandfather. E. No, they aren't.

Bill: Hello, Bobby. Welcome to my home.

Bobby: Hi, Bill. Are your dad and mum at home?

Bill: They are at the fruit shop.

Bobby:

Bill: They're my family pictures.

Bobby: Is he your father?

Bill:

Bobby: Wow, your grandfather is so young.

Bill: Yes.