Tom was caught cheating in an important exam. _____, he lost a golden chance of taking part in this competition.
Mr. Brown, ______ chairman of the trade union, will visit our factory in _____ month of May.
He has called several times this morning, ____ there is something very urgent.
You have to wear special clothing, a helmet and a life jacket ____ your raft gets turned upside down or sinks.
I wonder if ____ to come over to my family after work.
As I looked at the memorial, I thought about ____ terrible disaster it was for the people in Nanjing then and ____ they were to fight the Japanese invaders.