Past Modal Verb of Deduction

The window was broken, so the thieves ___________ got in through that window.

• must have

• can't have

• might have

I don't know where they went but they __________ gone to Paris or Marseille.

• could have

• must have

• can't have

I can't believe Jim hasn't arrived yet. He ___________ taken the wrong train.

• must have

• can't have

• must has

Sarah looked very happy. She __________ passed her driving test.

• must have

• can't have

• must has

Nobody knows exactly why he died. But we think it __________ been an accident.

• might have

• must have

• can't have

They _______ bought a new house. They are both unemployed.

• must have

• can't have

• could have

He _______ killed him, but we need more evidence.

• might have

• can't have

• must have

Alex _______ studied very hard, because she got top marks in all the exams.

• must have

• might have

• can't have

I'm sorry but Mr. Banks isn't here. He _______ left.

• must have

• can't have

• might have

He studied nothing and passed the exam, so he ________ cheated.

• must have

• can't have

• can't has