Fill in the gaps. Use must or have to in the

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. Its a present. You _______interrupt your teacher. My grandmother ________ work. Her husband had earned a lot of money.