He was busy writing a story,only _________ once in a while to smoke a cigarette.
. Don’t cry over your lost friendship any more. It ________ be helped.
. _______ not like Jim to be late for class. He is always on time.
. Can’t we just live in today, ________ the worries of tomorrow or the regrets of the past?
. If we ________ earlier, we would have had trouble getting good seats.
. . — You look troubled. — The director asked me to finish this task by Sunday. How can I ________ to?