It is an interesting story and one can't put it down _____ one has finished reading it.

.My reaction towards my classmates at the party was so cold and emotionless ____ I had never been interested in them.

The police came in __________ the thief attempted to rush out of the store.

I think _______ impresses me about his painting is the colours he uses.

The government has taken some measures to reconstruct the earthquake-hit areas, but it must be some time ________ everything returns to normal.