—Could you tell me 　　　　 after class every day?

—He usually plays football with his friends.

A．what does he do

B．what he does

C．what did he do

D．what he did

预防或避免呼吸机相关肺炎应特别注意哪项（）

A.防止呕吐物吸入

B.把病人安置于隔离病室

C.预防性应用高效、广谱抗生素

D.静脉应用高剂量丙种球蛋白

E.避免使用H受体阻滞剂，防止胃液pH值升高