We watched, amazed as fire _____ on the outside of the spaceship as the earth’s gravity increased.
By looking at a problem in as many ways as possible, creative thinkers can find solutions that would _______ remain invisible.
—What do you think of the performance today?—Great! but a musical genius could perform so successfully.
Get out of here at once. _________ not, I’ll phone the police.
she is not so cheerful she used to be?
—I’ve never found a better job and I’m so glad.—_______.