---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
It is a teacher's responsibility always to hope, ________ with learning, a boy's character might be changed.
What I like about Harvard is ________ there's the old classical look—there are parks and traditional buildings.
________ left the door unlocked must be held responsible for the accident.
One advantage of owing your own car is ________ you can go anywhere at any time you like.
________ we go there by train or by ship makes no difference. The time and the fees are the same.