---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
---Would you like to join me for a quick lunch before class?
---_______, but I promised Nancy to go out with her. (2008 .宁夏)
A I'd like to
B. I like it
C. I don't
D. I will