After his journey abroad, Richard Jones returned home, ___.
the project as planned, we’ll have to work two more hours a day.
You don’t need to make fancy foods to impress guests—it is something simple but good _____ will do.
The school has developed an online system students can choose their own teachers.
We’d better stay here a little longer he turns up unexpectedly.
---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