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 Who’s ？ ---This is Tom.

单选题 Hi, Tom, how’s everything with you?-- , and how are you?

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 It’s rather cold in here. Do you mind if I close the window?---( ).