The climbers __________ their ambition by reaching the summit of the mountain.
Mike was usually so careful, ________ this time he made a small mistake.
At school, some students are active ________some are shy, yet they can be good friends with one another.
Leave your key with your neighbor ________ you lock yourself out one day.
You have to move out of the way ________ the truck cannot get past you.
One's life has value________ one brings value to the life of others.