modal verbs

At school we ... to wear our school uniform.

You ....tidy up your room. I did it 2 hours ago.

We ... be polite while meeting other people.

You ...go on the grass!

We have a lot of sugar. We... buy more.

I am so thirsty. I.... something to drink

You ......... to do this task for tomorrow..

Teenagers...........be rude to their friends and parents.

I .......borrow this book, I have such one at home.

You ......tidy up your room every Saturday, because your mum will be angry.

Why were you absent yesterday? I ----- to stay with my little brother at home.

Teenagers.............smoke or drink alcohol.