.---I’m sorry, but there’s no smoking room in this section on the train.
---Oh, I that, and I won’t smoke again.
A. don’t know
B. won’t know
C. didn’t know
D. haven’t known
网友回答
A. don’t know
B. won’t know
(答案→)C. didn’t know
D. haven’t known
解析:考查时态。句意:对不起,但是或者上这节车厢没有吸烟室。——哦,我不知道这件事,我不再吸烟了。结合语境可知前文描述的是过去的状态,故用一般过去式。选C。