我国对外贸易管制制度是由一系列管理制度构成的综合管理制度，其中包括( )。

A．进出口许可制度

B．海关监管制度

C．出入境检验检疫制度

D．出口退税制度

— Did you make sense of what I said at the meeting?

—No.Your meaning didn't ________.Would you like to explain it a second time?[ ]

A. get in  

B. get across

C. get over 

D. get through