The police used tear gas against the demonstrators.

He was sprayed with tear gas during the demonstration.

I will abstain from attending this meeting.

We are participating in this project by delegation.

Please remember to bring your admission ticket.

This bottle is reusable.

He is the most competent employee of our company.

Are you really not going to use this unused laptop?

I went to the police station yesterday.

He was caught by the secret police.