Must- Have to- Should

You .................... wear a helmet when you ride your bike. It’s the law.

• should

• must

• ought to

You ....................to stop worrying so much. It’s not doing you any good.

• can

• should

• ought

It’s your duty to keep the house clean and tidy.

• You ought to keep the house clean and tidy.

• You must keep the house clean and tidy.

• You should keep the house clean and tidy.

You are not allowed to climb public buildings without permission.

• You needn’t climb public buildings without permission.

• You shouldn’t climb public buildings without permission.

• You mustn’t climb public buildings without permission.

It’s not necessary for you to do more exercise, but you should eat a healthier diet.

• You mustn`t do more exercise, but you should eat a healthier diet.

• You shouln`t do more exercise, but you should eat a healthier diet.

• You don’t have to do more exercise, but you should eat a healthier diet.

I advise you to use natural remedies whenever you can.

• You must use natural remedies whenever you can.

• You ought to use natural remedies whenever you can.

• You should to use natural remedies whenever you can.

Those who didn’t attend the seminar ... be present at the next one.

• must

• could

Luckily, I ... see a specialist. My arm got better in a few days.

• wasn’t able to

• didn’t have to

We ... get up so early – we had plenty of time.

• didn`t have to

• mustn`t

You .... come to school on time.

• ought to

• must