单选题 — How are you, Bob?
— ________

单选题 — Hello, I'm Harry Potter.
— Hello, my name is Charles Green, but ________ .

单选题 — I'm sorry. I am late due to the heavy traffic.
— ________

单选题 — Hi, Tom, how's everything with you?
— ________, and how are you?

单选题 — Thanks for your help.
— _________

单选题 — Who's ________ ?
— This is Tom.

单选题 — It's rather cold in here. Do you mind if I close the window?
— ________

单选题 — Paul, ________?
— Oh, that's my father! And beside him, my mother.