Fill in with the correct form of mustn't, don't need to/don't have to. 1 we don't have to/don't need to be at school until 9 o'clock. 2 you get stressed about the homework – it's easy. 3 you eat too much junk food – it’s bad for your health. 4 she change her diet – she always eats healthy food. 5 the children watch too much tv – it's bad for their eyes.