It's OK. You ___________ pay now. You can pay me at the end of the month.
don't have to
You _____ stay out so late without ringing me. I was worried sick.
musn't
You _____ have lunch with my parents. I'm not forcing you
don't have to
You___ buckle if you are in the car
must
They ____ clean the house said the mom
have to
