Mixed idioms

Student mentors catch children before they ..... the cracks.

In the past and in mythical stories, people who claimed they could see into the future often used ..... balls.

A person who participates directly in a war, military action, or other armed conflict is called a ......

She put her favourite CD on and turned it up full blast.

We tried to catch the thief who'd snatched the handbag but he showed us a clean pair of heels.

If you are in any doubt about the offer, please give me a ring.

I'm afraid you've left that food too long out of the fridge and now it's gone off.

He's not really doing anything serious at the moment because he's just marking time until he finds a proper job.

You mark my words you do as I say and you'll be all right.

Jonathon asks for too much at work. He really wants to have his cake and wants to eat it too.