---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
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
答
A
答
C.haven't noticed
现在完成时态
答
应该是 A