在横线处填入适当的句子补全对话

Bob: Hi! Tom.?

Tom: No, I don't like math. It's difficult. But my father says math is useful.

Bob: Your father is right. Math is useful. I like it. ?

Tom: My favorite subject is P.E. I think it's interesting.

Bob:  ?

Tom: Mr. Zhang is our P.E teacher. And he always plays games with us.

Bob:  ?

Tom: Yes. It's my basketball. Well, let's play basketball now.

Bob:  .