Complete the sentences with mustn't or the correct form it's not have to. 1. You mustn't smoke at petrol stations 2. She ____ come is she doesn't want to 3. We ____ miss the train. It's the least one tonight. 4. I ___ do this work tonight. I can do it tomorrow. 5. I ___ clean the floor today. I cleaned it yesterday. 6. We ___ forget to lock all the doors before we go away. 7. They ___ sit in the sun for too long. They might get burnt. 8. We ___ stay in a hotel in London. Wet can stay with my cousin. 9. He ___ come home too late. He's got an important day tomorrow. 10. We ___ spend too much money tonight. We've only got a little left.