---I feel terrible ,but I’ve just broken your ashtray.

---_________, for I had meant to change it.

A．Go head

B．No problem

C．it’s nothing to get upset about

D．I’ll look into it immediately

在心血管梅毒治疗时，为避免吉海反应，青霉素注射前1日要使用何种药物()

A．泼尼松

B．扑尔敏

C．氯丙嗪

D．丙磺舒