I'm sorry,but there's no smoking on this flight Oh,I___that.sorry,I won't againI'm sorry,but there's no smoking on this flightOh,I___that.sorry,I won't again A．don’t know B．didn’t know C．won’t know D．haven’t known 题目说选B.选D

I'm sorry,but there's no smoking on this flight Oh,I___that.sorry,I won't againI'm sorry,but there's no smoking on this flightOh,I___that.sorry,I won't again A．don’t know B．didn’t know C．won’t know D．haven’t known 题目说选B.选D
I'm sorry,but there's no smoking on this flight Oh,I___that.sorry,I won't again
I'm sorry,but there's no smoking on this flight
Oh,I___that.sorry,I won't again
A．don’t know B．didn’t know C．won’t know D．haven’t known
题目说选B.选D要的不?我过去不知道飞机上不能吸烟,影响是我现在抽烟了 你提醒我了,我下次不抽了.
过去对现在产生了影响.完成时.我好想有点无法正确理解句子的意思唉 怎么办呢

I'm sorry,but there's no smoking on this flight Oh,I___that.sorry,I won't againI'm sorry,but there's no smoking on this flightOh,I___that.sorry,I won't again A．don’t know B．didn’t know C．won’t know D．haven’t known 题目说选B.选D
过去时态和现在完成时态的区别在于过去时态强调动作发生在过去.而现在完成时强调过去动作对现在的影响.
显然本题是在强调我过去不知道这个动作,所以选择B.一般过去时态