The English in the future will be quite different from the English of today.

It is possible that some English words may ____ even completely.     [ ]

A. die down  

B. die out    

C. die off    

D. die of

柜员办理理财类交易账户加挂失业务需经（）授权。

A.无需授权

B.综合柜员

C.支行长