I did my best for the exam.

The prime minister should do his best for the people.

We always strive for the best results.

He exhausted all his strength to finish the job.

He exhausted himself by working to the limit.

The health of the nationals is the wealth of the country.

He was very successful as the Federal Chancellor of Germany.

He used every possible means to make the project successful.

He is devoting himself to his work.

She was devastated by sadness and cried her eyes out all night.