—How do you find Qingdao, Mary?  

—It's a beautiful seaside city. I have________ it for my next holiday.    [ ]

A. decided on      

B. tried on      

C. taken on      

D. carried on

（）退回时，应在相关清单或接收邮件登记簿上批注“退”字及退回原因。

A.挂号函件

B.保价信函

C.包裹

D.平信