单项选择题
根据各组对话内容，从下面提供的5个选项中选出能填入空白处的最佳选项。
A:I’m leaving for Hong Kong for a weekend 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.