Modal verbs: Obligation, prohibition, permission, and advice

You _____________ wear a helmet while riding a bike in this city.

• must

• can

• might

• should

Students ____________ bring their textbooks to class every day.

• can

• mustn't

• needn't

• should

Drivers _____________ park in this area after 6 PM.

• must

• might

• can't

• should

You ___________ smoke in this restaurant.

• shouldn't

• can't

• mustn't

• may not

Children _____________ watch TV until they finish their homework.

• can't

• mustn't

• shouldn't

• might not

You _____________ talk loudly in the library.

• might

• shouldn't

• can

• must

Employees _____________ be late for work without a valid reason.

• can't

• mustn't

• shouldn't

• needn't

You _____________ turn off your cell phones during the flight.

• must

• can't

• shouldn't

• might not

Guests _____________ take photographs inside the museum.

• can

• mustn't

• may not

• should

I think you _____________ see a doctor about that persistent cough.

• should

• must

• might

• can