The formation of a mountain requires millions of years.

He formed a new team.

This ancient artifact is very valuable.

It is very interesting to learn about ancient history.

We should take responsibility as part of society.

He bought a new jacket.

My room is on top of the building.

This book is the first volume of a trilogy.

We will make a decision after listening to his opinion.

He received the letter challenging him to a duel and began preparing for the duel.