Modal verbs

Fill in an apropriate modal verb:

A: Is Jason at work today?

B: He _____. His car isn`t in the car park

Fill in the gap with must, mustn`t or needn`t/don`t have to:

A: You_____ be late for your job intervews.

B: I know. I`ll leave early so as to get there on time.

When we talk about obligation, duty or necessity we usually use:

Choose the correct word in bold:

A: I found a briefcase on the train.

B: You ought to/must/can/may take it to the police station as soon as possible

We use_____ to show that someone had the ability to do something in a particular situation in the past.