_______ that we can't get the necessary equipment, we will have to give up theexperiment.
. Early to bed and early to rise ______ a man healthy, happy and wise.
. Mathematics ______ the language of science.
. The young ______ the vital forces in our society.
. Every man, woman and child ______ some history, enough at least, to survive in the world.
. None of them ______ my friends.