The restaurant won't be busy tonight. We ... reserve a table.
don't need to
mustn't
I was very busy last week. I ... work every evening.
must
had to
I want to know what happened. You ... tell me.
You ... tell Sue what happend. I don't want her to know.
I ... hurry or I'll be late.
Why were you so late? I ... wait half an hour for a bus.
We ... decide now. We can decide later.
It's Lisa's birthday next week. I ... forget to buy her a present.
