I've decided to keep all these stamps as they might be ________ some day.(2012·天津联考)
Sorry, I am too busy now. If Itime, I would certainly go for an outing with you.
_____I always felt I would pass the exam, I never thought I would get an A.A. While B. Once C. If D. Until
"The moment _____soon," he thought to himself, waiting nervously.
Everyone in the village is very friendly. It doesn’t matter ____you have lived there for a short or a long time.
Close the door of fear behind you, and youthe door of faith open before you.