— I am sorry, but there is no smoking room in this section on the train. 

— Oh, I______ that,and I won't smoke again. [ ]

A. don't know          

B. didn't know      

C. won't know    

D. haven't known    

足跖面的皮肤神经支配是（）

A.腓长神经

B.胫后神经

C.腓浅神经

D.隐神经

E.腓深神经