1The tell-tale signs of exhaustion on her face made it clear she had been working all night.
2Is the company's financial report a tell-tale indicator of the economic downturn?
3The tell-tale smell of smoke led the firefighters to the source of the blaze.
4If you notice any tell-tale signs of trouble, report them to the authorities immediately.
5There are tell-tale clues in the novel that hint at the surprising plot twist at the end.