—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

保安门卫对进出人员证件的实验工作内容由两部分组成：一是核查出入人员的姓名、年龄；二是履行登记手续和来访人员出门时收纳所访问部门签字的加执。