补全对话。

A: 1______________?

B: Yes, please. Could you tell me the way to the First People's Hospital?

A: Let me see. Oh, it's far from here.

B: 2______________?

A: About five mi les. 3______________.

B: Which bus should I take?

A: The No. 1 bus will take you there.

B: 4______________.

A: It's about 30 minutes.

B: Thanks for your help.

A: 5______________.

魔术师发明了一个魔术盒，当任意数对（a，b）进入其中时，会得到一个新的数：（a－1）·（b－2），现将数对（m，1）放入其中得到数n+1，那么将数对（n－1，m）放入其中后，最后得到的结果是          ．（用含n的代数式表示）