Must - Mustn't - May - May not

You must .................... in class.

• listen to the teacher

• sit on desk

You must ......................... in library.

• shout

• wear headphones

You must ........................ before you go to bed.

• brush your teeth

• eat candy

You must ........................ in the library.

• turn off the phone

• turn on the phone

You mustn't ................... in class.

• study

• chew gum

You ........................ return book on time.

• must

• mustn't

You ........................ do your homework at home.

• must

• mustn't

You ........... touch the art in the museum.

• must

• mustn't

You mustn't eat when you're studying in class.

However, you ............ have food and drinks at breaktime.

• may

• may not

You may .............................. in the museum.

• bring your bag inside

• climb on the sculptures