Complete the sentences with 'can', 'must', 'have to', 'needn't'.

1. Can you help me with my pets while I’m away? 2. You must feed the animals twice a day. 3. You have to clean the parrot’s cage, I have already done it. 4. You needn’t have much trouble with Tom, but you will find him in the evening to be sure he is at home. 5. You mustn’t give Tom milk, only special dry food. 6. Don’t forget to give carrots and apples to the rabbit.