— Did he realize the serious situation immediately?— No. It was quite a long time ________ he really realized it.
Is ____ necessary to complete the design before National Day?
I hate _______ when young people speak to the elderly in a rude way.
—How long are you staying there? — _____depends.
______was known to them all that William had broken his promise______ he would give each of them a gift.
—When can we come to visit you? —Anytime you feel like .