—How tired he looks!

—Yes. He spends____time____his work.[ ]

A. a lot, in      

B. many; with

C. too much; on    

D. too much, in

股票作为一种金融工具，体现了货币的( )功能。

A．交换媒介

B．价值尺度

C．储藏手段

D．延期支付