Carbon monoxide is a toxic gas.

I recycled the cardboard boxes.

I love wearing my cozy cardigan on chilly days.

She lived a carefree life, always smiling and enjoying every moment.

You have many caring friends.

I had so much fun at the carnival.

We have a carpool arrangement where a few car owners take turns giving each other rides.

He used a knife to carve a beautiful sculpture out of wood.

The waterfall formed a beautiful cascade down the mountainside.

She has her arm in a cast.