—It's nine o'clock now.  I must go home.          

—I't's raining outside. Don't leave________it stops.        [ ]

A. when      

B. after      

C. while      

D. until

根据计税标准的不同，可以将税收划分为______。

A．流转税

B．所得税

C．从价税

D．从量税

E．行为税