______I always felt I would pass the exam, I never thought I would get an A. A. Once B. While C. If D. Until
Harry is feeling uncomfortable. He _____ too much at the party last night.
It remains to be seen _______the newly formed committee’s policy can be put into practice.
— How far can you run without stopping? — ________. I’ve never tried.
Anyone, once _______ positive for H7N9 flu virus, will receive free medical treatment from our government.
My uncle hasn’t been able to quit smoking, but at least he has_________ .