Fill in the gaps with mustn’t or needn’t / don’t have to.
1. A: You …mustn’t … do that again! It was very naughty!
B: I’m sorry!
2. A: Shall I buy some petrol in the car?
B: No, you ……………………. . I did it this morning.
3. A: You ………………..be late tonight.
B: I won`t. I will be home early.
4. A: Shall I give you a lift?
B: No, you ……………… . I `ll go by taxi.
5. A: You ……………… forget to pay the bills today.
B: I`ve already done it.
6. A: You ……………… lose the money I gave you.
B: I`ll put it in a safe place.
7. A: You ……………….. buy a gift for Daisy`s birthday.
B: Alright. I`ll just send a card.
8. A: Shall we take a picnic with us for Saturday?
B: No, we …………………… . We`re going to eat at a restaurant.

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