Fill in the gaps. use must or have to in the positive of negative form. if you want to make progress, you work regularly. you open the window. it may fall. i eat more vegetables and fruit. they are good for me. you pay for this book. it’s a present. you your teacher. my grandmother work. her husband had earned a lot of money.
mustn't
have to
don't have to
mustn't
doesn't have to