In order to understand his feelings, I had a deep conversation with him.

God only knows what he is thinking.

I have no way of knowing what he is thinking.

He is working hard to make his abilities known to the world.

It's better for him not to know the truth. After all, ignorance is bliss.

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

She is attending a self-defense class.

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.