Modal auxiliaries: Have to or must (Koen Van Cauwenberge)

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
Complete the gaps with a form of have to or must.

1. The teacher said:"You do all exercises on page 21 in Look Ahead."
2. I help my little brother more. My father said so.
3. I take these medicines. The doctor said so.
4. I write lines as a punishment because I threw the shoe of my neighbour through the window.
5. Sorry, I can't come. I clean my room. I can't live in such a mess anymore.
6. He clean the classroom because he had been throwing papers on the ground.
7. "You help me", said the mysterious woman to the detective.
8. "The rules be obeyed at all times!" shouted the headmaster.
9. "I go. Otherwise I'll miss my train."
10. I be home at one o' clock. Otherwise, my mother will kill me.