Modal Verbs of Obligation

You _____ cross the roads without looking. It’s dangerous.

• mustn't

• have to

• don't have to

You ____ turn on central heating. It’s automatic.

• mustn't

• have to

• don't have to

The exams are next week. I ____ work harder.

• mustn't

• must

• don't have to

You ____ forget your umbrella. It’s going to rain.

• mustn't

• have to

• don't have to

Students _____ listen to the teacher or they won’t understand.

• mustn't

• have to

• don't have to

You ____ cross the road when the red light is showing.

• mustn't

• have to

• don't have to

We _____ leave now or we’ll miss the plane.

• must

• have to

• don't have to

Sorry, I _____ go now. I don’t want to be late.

• have to

• don't have to

• must

You _____ come with us if you don’t want to.

• mustn't

• have to

• don't have to

You _____ take food in your room. It's a rule of our family.

• mustn't

• have to

• don't have to