---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
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---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
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