—I hear you ________ in a pub. What's it like?

—Well, it's very hard work and I'm always tired, but I don't mind.[ ]

A. are working  

B. will work

C. were working  

D. will be working

压缩氧隔离式自救器在携带与使用中应注意（）。

A．携带过程中严禁开启扳把

B．携带过程中要防止撞击、挤压

C．使用过程中不可通过口具讲话

D．使用过程中不得摘掉鼻夹、口具