My keys are inside the house.

He is quite a good cook.

I think his Japanese has improved quite a bit, hasn't it?

I am busy with work during the daytime.

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

He said he couldn't agree with the views of the revisionists.

Gender roles are an important element in defining individual behavior in society.

His role is to fulfill his responsibilities as a leader.

It is important to understand the importance of health.

This is a historic building.