问答题 根据中文提示，把对话中缺少的内容写在线上。这些句子必须符合英语表达习惯。打句号的地方，用陈述句；打问号的地方，用疑问句。
提示：Lucy要去艺术展览中心，向一位男士问路，该男士告诉她如何前往。
(L =Lucy; S =Sir)
L: Excuse me, sir.
51　 the Art Exhibition Cendive?
S: Yes, but it is quite far.It's about an hour's walk.You can take a bus there.
L:
52　
S: You can take Bus No.15.
L:
53　
S: About 20 minutes.And you can also take a taxi.
L: Taxi? That's a good idea.Thank you very much.
S:
54　 
L: Goodbye.
S:
55