—Mum, could I go out to play now?—Let me see. . . Yes,__________ you have finished all your school assignments.
Not until the teacher explained the importance of getting up early ______ we promise to come early.
—How about the party ______ at Mary’s house? —Wonderful! Everyone had a good time.
This is the best way ______ I have thought of ______ the problem.
Particular attention must be paid ______ welfare, especially in the poor area.
At this time tomorrow ______ over the Atlantic.