We were having a lesson ________ a policeman came in.
The house I grew up ________ has been taken down and replaced by an office building.
The students competed ____ the honor of winning ____ each other _____ the school sports meet.
What surprised me was not what he said but _____ he said it.
The teacher told us that the earth _____ around the sun.
Ted came for the weekend wearing only some shorts and a T-shirt, ____ is a stupid thing to do in such weather.