To play basketball and to go swimming ___ useful for character-training.
________to work overtime that evening, I missed a wonderful film.
It was a pity that the great writer died _______his works unfinished.
The boys were happily making a snowman, _________ with cold.
________ the prices and functions of different types of computers before you make up your mind which to buy.
-- Are you fond of watching TV?--- Not a bit. I would sit alone in the dark _______ I would watch TV.