When his explanation was over, he said, 'quod erat demonstrandum.'

That movie made a deep impression on me.

That movie left a deep impression on me.

I heard the cry of a cock early in the morning.

This brand of beer is very delicious.

I was appointed as the leader of the new project.

I was appointed as the new project leader.

I'm having a hard time dealing with his stubborn attitude.

He has a stubborn character and rarely changes his mind once he has made a decision.

He was prepared to risk his life to accomplish the mission.