.We were all waiting for you .You _____for the seaside by yourself without leaving a message.

A．mustn’t leave

B．shouldn’t have left

C．couldn’t have left

D．needn’t leave

治疗急性传染性肝炎的药物是（）

A.苦参、石膏

B.黄连、知母

C.金银花、鱼腥草

D.板蓝根、大青叶

E.苦参、青蒿