1 it's a secret. You mustn't tell it to anyone.
2 you must respect your parents
3 she is very rich. She doesn't have to go to work
4 this party is free. Youdon't have to Buy any tickets.
5 this is the last bus for Paris and we mustn't miss it.
6 you must be on time for exam.
7 they mustn't eat too much cake.
8 we're going to the restaurant, so our mother doesn't have to cook tonight.
9 you mustn't forget to turn off the light before you leave.
10 it's getting late. I think I must go now.
11 boys and girls, you must hand in your essays by Thursday.
12 Tom doesn't have to take a bus because his dad drives him to school every morning.
13 you mustn't tell me lies. It's just awful.
14 we don't have to tidy up our room because our sister did it yesterday.
15 you mustn't smoke on board the plane.
Объяснение:
