Perhaps the most important characteristic of rap music is the way ____ the artists sing.

A．that

B．how

C．which

D．as

国家烟草专卖行政主管部门可授权或委托（）烟草专卖行政主管部门签发烟草专卖品准运证。

A、省级

B、地市级

C、县级

D、各级烟草专卖行政主管部门