Her necklace was covered with a layer of pearl.

Her earrings are made of mother-of-pearl.

You really are an idiot.

That jackass made the same mistake again.

On April Fools' Day, I surprised my friend with a joke.

You really are a stupid man, aren't you?

He is a 'word processor idiot', his handwritten characters are terribly hard to read.

The aardvark is a nocturnal mammal that lives in Africa.

I received a vaccination for swine flu.

There are pigs and dogs in my garden.