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 but 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 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