Litmus paper turns red on contact with an acid.
They forget to solder the contacts.
Word: "contact"
different meanings

She knows how to work the system.
He works his parents for sympathy.
Word: "work"
the same meaning

The French try to sell us their image as great lovers.
The brothers sell shoes.
Word: "sell"
different meanings

Can you tell whether those flowers are real or silk, from this distance?
No, there's no way to tell.
Word: "tell"
different meanings