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

单选题 — How are you, Bob? — ________

单选题 — Thanks for your help. — _________

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

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

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

单选题 — Who's ________ ? — This is Tom.

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