-I’m sorry but there is no smoking on this flight.---Oh I that. Sorry I won’t again.

问题补充：

---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

答案：

解析：考查时态：句意：--很抱歉，但是飞机上个不能抽烟。--哦，我不知道，我不会再抽了。本题是在强调我过去不知道这个动作，所以用一般过去时态。选择B。