obligation, prohibition and permission

Reformulate the sentence starting with the word given. Use must, have to, need to, etc. In theory we can't talk in the library, but everyone does. We're _______ in the library, but everyone does.

Which is correct? Or both? *Can I / Am I allowed to* call my family on this phone?

Reformulate the sentence starting with the word given. Use must, have to, need to, etc. Is it the law to drive on the left or the right in this country? Do I _______ the left in this country?

Reformulate the sentence starting with the word given. Use must, have to, need to, etc. You're obliged to wear a helmet on the construction site. You _______ a helmet on the construction site.

weak and easily attacked

Which is correct? Or both? Employees *have to / mustn't* attend at least three training days per year to receive a certificate.

a connected system of computers

Which is correct? Or both? Do we *have to / must* wait outside until the security guard arrives with the key?

Which is correct? Or both? You *mustn't / don't have to* drink the water from this tap - it's only for washing hands.

Which is correct? Or both? You *need to / are allowed to* get a parking permit if you want to use the car park.

Which is correct? Or both? You *aren't allowed to / mustn't* smoke anywhere on the premises. Go outside if you want a cigarette.

stop working

Reformulate the sentence starting with the word given. Use must, have to, need to, etc. My job is to welcome guests and answer the phone. I ____ and answer the phone.

Reformulate the sentence starting with the word given. Use must, have to, need to, etc. This is a no-smoking area. We aren't ______ in this area.

Reformulate the sentence starting with the word given. Use must, have to, need to, etc. It isn't necessary to bring your laptop - we have one you can use. You don't ______ - we have one you can use.

stop something from happening

unreadable because it needs a password

Which is correct? Or both? The room over there is for having a coffee and taking a break. Anyone *can / needs to* use it.

Reformulate the sentence starting with the word given. Use must, have to, need to, etc. Can I use your password to log in? Am I _______ to log in?

Reformulate the sentence starting with the word given. Use must, have to, need to, etc. It is forbidden to take these documents out of the building. You _____ these document out of the building.

people who suffered

Which is correct? Or both? She *can't / doesn't have to* work with us if she doesn't want to. I just thought she might like to.