Have you decided ____ Canada? [ ]

A. when will you leave

B. when you leaving

C. when are you leaving

D. when you are leaving

现代信用货币的基本特征包括______。

A．本身不具有十足的内在价值

B．是债务货币

C．随时可以兑现

D．使用具有强制性

E．规定发行准备制度