---Must I be back home before 6 o’clock? ---No, you ____. But don’t be too late.
I’m sorry to keep you _______ for almost two hours.
He looks very pale. He may have _______ fever.
When the traffic lights are red, we _______ stop.
—Oh, you have a headache and a cough. __________ have you been like this? — Two days.
Would you mind _________ the piano softly ?