With smart phones taking the world by ____ storm, a phone that can only send and receive voice calls and text messages may seem like ____ relic.

A．a; a

B．the; 不填

C．the；a

D．不填; a

宾馆和饭店对在岗人员至少（）进行一次消防安全教育。

A．每日

B．每月

C．每半年

D．每年