Modals of necessity

Son: Mom, I don't want to clean my room. _________________ it right now?

Mother: Yes, right now.

• Do I have to clean

• Have I to clean

• Do I must clean

Answer explanation

Obliglation

According to the law, drivers ______________ at stop signs.

• must stop

• must stopping

• must to stop

You ____________ go to the ceremony if you don't feel like it. It'll be very boring anyway.

• mustn't

• have to

• don't have to

He ________________the bus because his brother picked him up at the station.

• didn't need to take

• mustn't

• must

We ________ be quiet.

•  mustn't

• must

• has to

Friend: _____________________ pay to see the doctor?

Brother: No, she ____________ because she has medical insurance.

• Do your sister / mustn't

• Do your sister have to / don't

• Does your sister have to / doesn't

You _________ eat fruits and vegetables if you want to be healthy.

• should

• shouldn't

• don't have to

A: I cannot sleep properly.

B: You ___________ drink too much coffee. I think that's the reason of your problem.

• need to

• don't need to

• shouldn't