Fill in the gaps must, mustn't, have to, don't have to / doesn't have to and the verbs: visit, touch, go, buy, learn,

1. I must be polite to my guests. 2. You musn\'t touch her books. She\'ll be very angry. 3. You don\'t have to buy me a new bicycle. My old one is very good. 4. You must visit your granny. She\'ll be very happy to see you. 5. I have to go to the shop and buy a warm jacket. 6. Mother doesn\'t have to walk the dog. We always do it. 7. You don\'t have to learn this song by heart. Your teacher won\'t ask you to sing it.