Hurry up, __________ we will miss the train.
--It’s a pity that you didn’t come to my birthday party last night.--I’m terribly sorry. I ________ for an important lecture.
--What made Kate so excited yesterday?--________ by her boss, as far as I know.
For years, it was viewed as a serious problem, ________ that has never been really solved.
--We need a man full of wisdom to take charge of the project.--________ the young man graduating from Harvard have a try?
Due to circumstances ________ our control, the performance has to be canceled.