Past modals of deduction

Police found the criminal's car at the station. He ______(leave) the area by train,

• must have leave

• must have leaving

• must have left

The investigators weren't sure what caused the computer virus. They think it _____ have been a hacker.

• may

• musn't

• must

You ______ seen me on the video. I didn't leave home yesterday.

• couldn't

• couldn't have

• can't

Alex missed the meeting yesterday. He must ____(know) about it. He is always punctual.

• know

• have known

• not have known

Ana didn't report her missing wallet for several hours. She _____ not have noticed it was missing.

• should

• would

• must

How was your performance during this activity?

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• Good

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