A、Tianjin. B、Chongqing. C、Shanghai. D、Beijing. D若不注意听可能会选A Tianjin，但是整篇对话着重点应该是the capital，且提到了the Great Wall，Summer Palace这些北京的

W: John, since you visited Tianjin last week,, where do you want to go tomorrow?
M: I want to visit every place here in your capital.
W: Well, I’ll have to make a list of the famous places for your reference.
M: Hong, it’s kind of you to be my tour guide.
W: I’d be glad to help you.
M: You know I really want to see all of the Chinese tradition here, so I think I can’t miss the Great Wall.
W: Of course, but the Great Wall won’t be open this Thursday, so maybe tomorrow we can go to Summer Palace instead.
M: Oh, what a pity!