Complete the rules. Use must/mustn't. You... 1 keep the room clean. (✔) 2 play music after 10:00 am. (✔) 3 put posters on the walls. (X) 4 keep pets in the room. (X) 5 make the bed. (✔)

1. You must keep the room clean. 2. You mustn't play music after 10:00 am. 3. You mustn't put posters on the walls. 4. You mustn't keep pets in the room. 5. You must make the bed. Объяснение: * Must используется, когда что-то необходимо сделать. * Mustn't используется, когда что-то нельзя делать.