You mustn't .....( chew / switch) with your mouth open
chew
You mustn't lie on the floor, ..... (platforms / plane), or stairs at a train stations
platforms
You mustn't bring ..... (healthy / alcoholic) drinks
alcoholic
You must know what movie you want to see before you buy tickets at the ..... (museum / cinema)
Cinema
You mustn't ....... ( endanger / cause) others by running, skating and throwing objects.
Endanger
You mustn't ..... (enter / push) the competition area
enter
You mustn't bring food, drinks, or gum to the pool ..... (deck / playground
deck
You mustn't cook or .....(cause / switch) a fire
cause
You mustn't ..... (ask / give away) the surprise ending if you have seen the movie before
give away
You mustn't ..... (allow / endanger) any other person to use your card
allow