modals of obligation

You ... help me with the dishes, but I would appreciate it if you did.

• mustn't
• don't have to
• have to
• must

I'm not going to pay that bill! She ... pay it!

• mustn't
• doesn't have to
• has to
• must

Dennis! You ... hit your sister ever again!

• mustn't
• don't have to
• have to
• must

You're not allowed to drink alcohol yet. You ... be 16 years old.

• mustn't
• don't have to
• have to
• must

We ... wear a uniform at our school (Glorieux).

• mustn't
• don't have to
• have to
• must

She has a very high fever. She ... visit the doctor at once!

• have to
• doesn't have to
• has to
• must

Skateboarding is awesome! You ... give it a try!

• mustn't
• have to
• don't have to
• must

They ... bring dessert, but they can if they want to.

• mustn't
• don't have to
• doesn't have to
• have to

My girlfriend is expecting me at 8 p.m. I ... be late!

• mustn't
• don't have to
• have to
• must

He ... get up early on weekdays, he can sleep late.

• doesn't has to
• mustn't
• has to
• doesn't have to