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 ar...

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