Obligations

I ... do my homework.

• must

• mustn't

• doesn't have to

• don't have to

I ... help my schoolmates, but I can.

• must

• mustn't

• doesn't have to

• don't have to

The students ... speak too loudly during the lesson.

• must

• mustn't

• doesn't have to

• don't have to

The students and the teachers ... be polite.

• must

• mustn't

• doesn't have to

• don't have to

The teacher ... answer questions during the weekend.

• must

• mustn't

• doesn't have to

• don't have to

The teacher ... sleep during the lessons.

• must

• mustn't

• doesn't have to

• don't have to

The school director ... wear a tie every day, but he can.

• must

• mustn't

• doesn't have to

• don't have to

The parents ... come into the school without autorisation.

• must

• mustn't

• doesn't have to

• don't have to

Students ... use their phone on the school yard during the break.

• must

• mustn't

• doesn't have to

• don't have to

In our school, students ... wear a uniform.

• must

• mustn't

• doesn't have to

• don't have to