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