How do you solve this problem?

He likes to take a walk in the park at dusk.

She is attending a self-defense class.

This reaction has reached chemical equilibrium.

Let's enjoy the party with no formality tonight.

He is traveling around the world in search of the legendary elixir of eternal life.

He is known as an expert in the practice of law.

An abnormality was found in the preoperative examination.

Using mnemonics, it became easier to remember new words.

We should understand the importance of public education.