One of our rules is that every student _______ wear school uniform while at school.
My sister met him at the Grand Theatre yesterday afternoon, so he ________ your lecture.
—How is that, Joan?—Yeah, it’s from the boss. She _________ first, whether she likes it.
_______ fired, your health care and other benefits will not be immediately cut off.
—Who is the girl standing over there?— Well, if you _____ know, her name is Mabel.
—They haven’t finished the work up to now.—Well, they________.