Must / Mustn't

At school: you ...................... write on the desk.

• must

• mustn't

In a library:

you ...................... be quiet.

• must

• mustn't

In the house:

you ...................... play football.

• must

• mustn't

In the sea:

you ...................... swim far.

• must

• mustn't

On the road:

you ...................... look left and right.

• must

• mustn't

You ...................... help your grandma.

• must

• mustn't

Children ................................. fight in class.

• must

• mustn't

I .............................. eat chocolate for breakfast.

• must

• mustn't