rewriting modals

Gap-fill exercise
By Juan Ignacio Montorio

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!

My mum didn't let us go snowboarding.
We .
We didn't have permission to watch TV.
We .
It's not neccessary for you to do the cleaning.
You .
Smoking is prohibited at school.
You .
Playing football was permitted at the weekends.
We .