---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

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---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
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---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
---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

---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
应该是 A

C.haven't noticed
现在完成时态

A