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

单选题 —How are you, Bob?
—________

单选题 —Thanks for your help.
—_________

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

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

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 —Who's ________ ?
—This is Tom.