---Excuse me,sir.Could I ask you to put out your cigarette?I

问题描述：

---Excuse me,sir.Could I ask you to put out your cigarette?It's a non-smoking area.
---Sorry.I____the sign.
A.didn't notice B.don't notice C.haven't noticed D.hadn't noticed

1个回答分类：英语 2014-10-06