Correct the mistakes

Gap-fill exercise
By Nacho Montorio

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!
1. He must goes home now. .
2. I mustn't making noise. .
3. She musts do her homework. .
4. We musn't phone from school. .
5. We must to go shopping. .