—Excuse me, could you please show me how to use this MP4 player?      

—_____.      [ ]

A. Certainly! It's here.          

B. Yes, you can  

C. Sure, with pleasure            

D. Not at all

浅埋式地铁车站的出人口设置不宜少于（）个。

A.5

B.3

C.2

D.4