The children ____ spend too much time playing computer games.

• A. mustn’t

• B. ought to not

• C. shouldn’t

• D. Both B and C

I think you ____ do exercise regularly in order to keep your body in good shape.

• must

• should

• ought to

• both should and ought to are correct

We ____ eat as much fruit as possible in order to get enough vitamins for our bodies.

• should

• had better

• ought to

• all are correct

You ____ tell anyone what I’ve revealed to you. It’s still a secret.

• A. mustn’t

• B. had better not

• C. ought not to

• D. don’t have to

When playing or swimming in the pool, children ____ be accompanied by their parents.

• A. should

• B. must

• C. don’t have to

• D. have to

We ____ go to work by car. Sky train is a wise choice during rush hour.

• A. ought to

• B. mustn’t

• C. shouldn’t

• D. have to

He ______________ anything because he’s driving.

• A. didn’t have to drink

• B. mightn’t drink

• C. shouldn’t drink

• D. can’t drink

“Will you stay for lunch?”

- “Sorry, I _____. My brother is coming to see me.”

• must

• can't

• needn't

• won't

There was a lot of fun at yesterday’s party. You _____ come, but why didn’t you?

• A. must have

• B. should

• C. need have

• D. should have

You _____________ 17 to get a driving license in the UK.

• A. needn’t be

• B. should be

• C. have to be

• D. ought to be