UPPER+ / modals of deduction

The thief ___ a key. The door was locked and nothing was broken

He worked hard on his report, and then accidentally deleted the file from his computer. He ___ upset when it happened.

Even though John has been studying hard, there's still a chance that he ___ do well on the exam.

She's working full-time and studying. That ___ easy.

We regret to inform you that some services ____ be delayed due to bad weather.

This ___ be her house. I can see her car parked outside.

Andrea thought she saw her old university professor this morning but it ___ him – he moved abroad years ago.

Police suspect the kidnapper ____ the country using a fake passport.

You should pick up the phone. It ___ be an important call. You never know without answering.

Ally ___ (leave) the house. Her house keys are on the table.