提示：Alice来看望Bill。他们有一年未见。Alice说她三天前才到，要在此地待一个月。Bill说，说实在的，他很想念Alice，并邀请她喝咖啡。
Bill: Come in, please.
Alice: Thank you.
Bill:{{U}} (51) {{/U}}. How have you been lately?
Alice: Very well. And you?
Bill: I'm well, too.
Alice:{{U}} (52) {{/U}}. I just drop in on you.
Bill: It's very kind of you.{{U}} (53) {{/U}}, I miss you very much.
Alice: So do I.
Bill:{{U}} (54) {{/U}}?
Alice: No, thanks. I'll have an appointment at four, and I've got to go.
Bill: Must you go so soon?
Alice:{{U}} (55) {{/U}}. I'll surely visit you again.