All our class burst out when we heard the story.
.---I’m terribly sorry to have put you through so much trouble.--- ________. I know you didn’t mean to.
A study shows that students living in non-smoking dormitories are less likely to ________ the habit of smoking.
.--- ______,he knows a lot of things.
The play had already been on for quite some time when we __ at the New Theatre.
Once again he didn’t hand in his homework _____ he had been given enough time to do it.