PK（park keeper):Excuse me,sir.
A(Aman):Yes?
PK:I'm a park keeper here.
A:Un-hn.
PK:I'm wondering whether you threw a cigarette butt on a path just now.
A:Oh,yes.So what?
PK:You know,sir,there are theregulations in this park.What you did is banned .And if you do it again,you will face fines.
A:I'm sorry about that.I didn't know it.
PK:So please observe theregulations.Everyone is expected to create a beautiful for others.
A:I'm sorry again.Thank you for reminding me.