More and more teaching _______ are being developed across the globe, which are sure to _______to    make classroom teaching more lively and interesting.      [ ]

A. aids; help      

B. assistance; help    

C. aids; assist    

D. helps; aid

取消交易在_____网点凭“邮政储蓄修改分户账通知单”经综合柜员授权后办理。(三级)