Some people never know what they need ______ they lose it.A. until B. as C. after
Jim, your spelling is too terrible. You should ______ it.
Sam’s favorite team won the game. He was excited ______ the news.
Nick is ______ busy ______ he has no time to have a meal with his family.
Mrs. Green warned us ______ more water because of the hot weather.
Look at those students. ______ hard-working they are!