She gave birth to her first child at twenty years old.

She said she was twenty years old, which was not true.

He wrote this book at the age of twenty.

Last month our twenty-year-old daughter gave birth to a baby girl.

We Japanese come of age at twenty.

We are entitled to vote at the age of twenty.

I'm not twenty years old yet.

She has just turned twenty.

Laurie is twenty years old.

Our son will be 20 years old in two years.