--The cake is too expensive. Would you like to show me a _______one?

--Sure. Here you are.

A. cheap                               B. cheaper                                    C. cheapest

国家通常会对限制进口或者出口的货物实行( )的方式管理。

A．价差补贴

B．配额

C．出口退税

D．许可证

E．低息贷款