I was just about to go out last night ______ the telephone rang.
It's much easier to make friends __________ you have similar interests.
Experts believe __________ people can waste less food by shopping only when it is necessary.
Food supplies may __________ towards the end of the trip, so we can't waste any food.
The watch was very good, and he __________20 percent down for it.
I got to the office earlier that day,__________ the 7:30 train.