— What's the matter with the computer?

—It is dead now.

从方框中选择最佳选项完成对话，有两项多余。

A: Excuse me,  sir. Could you tell me the way to the hotel? 
B: Sorry, ____  I'm new here.____ 
A: Excuse me,  madam. Could you tell me how to get to the hotel? 
C: Go along this street to the first turning. Turn right at the end of the street,  and then you'll see the hotel.
A: ____ 
C: Yes,  you can.
A: ____ 
C: You can take a No. 2 Bus.
A: Thank you.
C: ____ 

a＞1，则$a+\frac{1}{a-1}$的最小值是____ ．