— 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    

    位于____     ____半岛和苏门答腊岛之间的____    ____海峡，是连接_____   ___洋和____   ____ 洋的重要海上通道。