His death gave us all a great shock.

The ringtone of my mobile phone is a Beatles song.

I changed the ringtone of my mobile phone.

Ousa goes for a walk with her dog every morning.

The police are looking for an eyewitness to the incident.

The seismologist is studying earthquake prediction and disaster prevention.

He was an eyewitness to the incident.

The freight train passed through the station.

Let's roll the dice and decide the next action.

He is a world-famous physicist.