1. The 20th century was a time of great change and innovation.
2. My great-grandfather lived to be over a century old.
3. The Roman Empire lasted for over four centuries.
4. The Industrial Revolution began in the 18th century.
5. The Renaissance was a period of great cultural and artistic achievement in Europe that spanned the 14th to 17th centuries.
6. The United States is a relatively young country, only a little over two centuries old.
7. The next century will likely bring even more progress and advances in technology and society.
8. The average human lifespan has increased dramatically over the last century.
9. The 21st century is shaping up to be a century of environmental stewardship and technological advancement.
10. The 20th century began with optimism but ended with a world war.