读我国南方地区某地等高线图，回答下列问题。

A: You must be really excited about leaving for London tomorrow, Judy!

B: Yeah.____

A: Nervous about what?

B : I don't know many of the customs and manners in UK.____

A : Sure.

B:____

A: Well, it's important to be on time when you're invited for dinner.

____ The British expect their guests to be on time.

B: Then how long may I stay there?

A:____ Or you seem to have come only for the meal. When your friends seem to be getting sleepy and running out of things, it's time to leave. The next day, call or write a thank-you note to say how much you enjoyed the evening.