补全对话

A: Do you____English?

B: No, I____

A:____your favorite subject?

B:____favorite subject is PE.

A:____do you like it?

B: Because____exciting.

A:____your P.E.teacher?

B: Mr. Liu.

A: Is____young?

B: Yes. He's only twenty-three years____.

A: Is he strict (严格)?

B: Yes, but we all like____