他十六岁，无忧无虑。

He was sixteen years old and didn't have a ___care in the world.

世界是你的牡蛎，你无忧无虑。

The world is your oyster and you do not have a ___care in the world.

她优雅地承受着家庭的忧虑。

She bore the ___cares of her family with grace.