Fortunately, someone who happened to be passing by called the fire department ________the fire broke out.

_______ we got to the station, the train had left already.

She had to drop out of school _____ her family couldn’t afford the cost of her education. 

________we went to visit Professor Smith, he________his research work.

We can't complain that children are cheating in examinations ______ adults themselves have set such a bad role model for them to follow.