have to, don’t have to, had to, didn't have to, must, mustn’t

You ____ leave now; you can stay a bit longer.

You ____ put salt in her food; the doctor said she can't eat salt.

You ___ use a computer on the plane.

At a restaurant you _______ pay the bill but you _______ eat everything. 

You ____ have a ticket with your name on or you can't travel.

You ______ leave your bags with someone you don't know.

You ___ leave karate, your leg is OK.

I'm having some trouble understanding this. I ___ ask Peter a few questions.

_________ work next weekend?

Bicyclists _____ remember to signal when they turn.

You ______ try the turkey sandwich. It's absolutely delicious!

You ___ to tell her that you are sorry.

I ______ wear glasses, I still can see perfectly well.

He ____ work on Saturdays.