礼貌用语:Thank you. / You're welcome. — 英语选择题
题目
放学时,Tom的书包带子开了,Lily帮他扶好书包,还帮他背到肩上。Tom要对Lily表示感谢,Lily也要礼貌回应。下面哪组对话顺序和内容都正确?A. Tom: You're welcome. Lily: Thank you. B. Tom: Thank you. Lily: You're welcome. C. Tom: Thank you. Lily: Thank you. D. Tom: You're welcome. Lily: You're welcome.