--- I’m sorry, but there is 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
网友回答
A. don’t know
(答案→)B. didn’t know
C. won’t know
D. haven’t known
解析:考查时态。句意:对不起,但是这个航班上不许吸烟、——哦,我不知道。抱歉,我不会再吸了。结合语境可知下文描述的是刚才的动作,故用一般过去时态。选B。