T4 - Speculation & Deduction (PAST/PRESENT)

His lips are blue. He ____ be really cold.

We use ___ when we are 90% certain that something was not true.

When we are speculating and making deductions, the opposite of must is___.

We use ___ when we are 90% certain that something is true.

He looks exhausted. He ___ ___ run all the way here.

Somebody is knocking at the door. It ____ be the postman because he's already been.

We use ___ when we are 90% certain that something is not true.

I don't know when the cup final is. It ___ be next week.

We use ___ when we are 90% certain that something was true.

Somebody's taken my red pen. It ____ ____ been Jack because he lost his one.

Mike hasn't replied to my email. H ___ ____ ____ received it.

My friend climbed a really high mountain. That ___ ___ been easy.