Modals of deduction

She's won prizes for her research. She ​ (a)  

be really intelligent.

• must
• can't
• may
• could

I'd take an umbrella if I were you. It looks like it ​ (a)  

rain.

• may
• must
• can
• can't

His car's not here. He ​ (a)   have gone out.

• must
• can't
• can
• mustn't

That restaurant .... be very good. lt's always full of people.

lt rained every day during their holiday, so they ...... have had a very nice time.

Sarah knows a lot about films. She must .... to the cinema a lot.

I didn 't hear the phone ring. I must ...... asleep.

I'm sure you know this song. You must ........... it before.

The police have closed the road, so we have to go a different way. There must .........

an accident.

When I got back to my car, the door was unlocked.

(I / forget / to lock it)