胃肠出血及肝、肾病首选

A．马勃

B．白头翁

C．秦皮

D．鸦胆子

根据各组对话内容，从下面方框里提供的5个选项中选出最佳选项

A：I’m leaving for HongKong for aweekend break.

B：（）。

A．Sure. What is it

B．It’s very nice of you to say so.

C．It’s nothing.

D．Have a nice trip!

E．Certainly. Here you are.