化验人员应穿工作服。化验室应配有（）以及毛巾、肥皂等物品。

A.自来水

B.通风设备

C.消防器材

D.急救箱

E.急救酸、碱伤害时中和用的溶液

—Go and see who's in the classroom.

—______. I think they are all on the playground.        

A. Somebody                  

B. Anybody

C. Nobody                    

D. Everybody