—I really don’t know whether I should tell my father about the exam.—Well, don’t speak until ________.
The hostess left the money on the table _____purpose to test the honesty of her maid.
People in ancient times ______ series of important events so that we now have what is called history.
It was the first time ______ I ______ here.
Remember never to leave your dog ______. It might bite people around.
_____ of the students who took part in the military training is 450.