He is so addicted to smoking that ________ seems to be no chance of talking him into quitting.

A．this

B．what

C．it

D．there'

发行和使用国债是对国民收入的再分配，反映了社会资源的重新配置，是财政( )的重要手段。

A．协调支出

B．弥补损失

C．调节经济

D．筹集资金