---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
You’d better give the task to _____ you think can finish it ahead of time.
I don’t think John saw me; he _____ into space.
As a writer _____ the new century, he is popular among the teenagers.
_____ the great efforts we had made three years before, we failed to carry our plans through.
Although this medicine can cure you _____ your illness, it has a bad effect _____ you.