Read the situations and complete sentences with "must or mustn't"and the words in brackets
1- You're in a library. (shout) You__________________. 2-You're in the theatre. (use your mobile during the show) You__________________. 3- You're travelling to the USA. ( have a passport) You__________________. 4- You're doing an exam. (Look at your friend's paper) You__________________. 5-You're playing football. (hold the ball) You__________________.
2mustnt
3must
4mustnt
5must