I ______ Mr White at that time, otherwise I wouldn’t have asked you for some information about him. [ ]

A. hadn't known    

B. didn't know        

C. don't know    

D. haven't known

发生晕车、晕机或晕船时，可给予（）

A.口服苯海拉明

B.口服VitB₁20mg

C.口服地西泮2.5～5mg

D.口服西咪替丁O.2g

E.口服甲氧氯普胺（胃复安）10～20mg