Degrees of certainty with modal verbs

I'm sure it took ages to write the report as it's so detailed. = (must) That report __________ to write, given it's so detailed.

Your glasses ______ somewhere. You ______ looked very hard.

He's been working thirteen-hour days for weeks. He _______ been exhausted.

It ________ been difficult, only seeing your kids once a month.

It _______ be very nice, finding you're being cheated on!

I very much doubt the painting is worth a lot. = If you ask me, the painting... (be) a lot.

Given the time of the murder, she _______ done it. It ______ someone else.

He tore his knee ligaments. It ______ hurt like mad!

I'll check she's not waiting for us outside, it's possible she is. = (might) She ________ outside, so let me go and check.

The police believe it's possible the thieves got in through an open window. = The thieves ... (might) through an open window, according to the police.