103 Grammar 4B

You ___ use your phone in quiet zones. It's a rule

• don't have to

• mustn't

• both are possible

Do you think we __ text Dad to tell him we'll be late?

• should

• ought to

• both are possible

You __ send text messages when you are driving.

• don't have to

• mustn't

• both are possible

You ___ talk on your mobile when you're filling up with gasoline.

• shouldn't

• mustn't

• both are possible

I ___ speak to my phone company. My last bill was wrong and they charged the double.

• have to

• must

• both are possible

A pilot ___ wear a uniform when he has to work.

• has to

• must

• both are possible

We __ hurry. We have plenty of time.

• don't have to

• mustn't

• both are possible

Which modal is used for giving advice? More than one answer can be marked.

• ought to

• must

• have to

• should

Which modal is used for expressing PERSONAL/ INTERNAL obligation?

• ought to

• must

• have to

• should

Which modal is used for expressing prohibition?

• ought not to

• mustn't

• don't have to

• shouldn't