The smoker was smoking a cigarette outside the restaurant.

Nitrous oxide can be used for anesthesia and to boost engine power.

He openly declares that he is an atheist.

He spoke to me directly.

Please go straight on this road.

His opinions are always direct, and that's part of his charm.

He is a very sincere person.

I should do my duty.

This paper is very thin.

I make origami using paper.