Professor James will give us a lecture on the Western culture, but when and where ________ yet.[      ]

A. hasn't been decided  

B. haven't decided

C. isn't being decided  

D. aren't decided

依法对待定的进出口货物,物品减征或免征关税是海关的权利之一,这种权利属于()。

A.行政许可权

B.税费征收权

C.行政裁定权

D.行政强制权