I would have come earlier,but I________that you were waiting for me.[ ]

A．hadn't known  

B．didn't know

C．would have known  

D．haven't known

下列不属于按通货膨胀原因进行分类的是( )。

A．成本推动型通货膨胀
B．需求拉动型通货膨胀
C．结构失调型通货膨胀
D．温和式通货膨胀