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。
51.提示：星期五晚上有音乐会Chis得到两张票，打电话给Linda，问她是否有空-同前往，并约她音乐会后一起吃饭。Linda 听了非常高兴，两人相约六点四十五分在入口处见面。
Linda:Hello！This is Linda speaking.
Chris：Hello，Linda，this is Chris.(51)this Friday evening？
Linda:Yes，why？
Chris：There's a good concert，and I've got two tickets.I wonder (52).
Linda：That's great！(53).
Chris：7 o'clock.But how about(54)at 6:45?
Linda:OK.I think 1 can make it.
Chris：After the concert，(55)，shall we？
Linda：Wonderful！Why don't we go to a Chinese restaurant？
Chris:Why nol？OK，see you Friday.
Linda:See you then.Bye！