He is a person who can distinguish between good and evil.

Due to the new coronavirus, we had to undergo a two-week quarantine.

The doctor examined his semen sample.

The separation from him was very difficult for me.

He had all the necessary information for the exam at his fingertips.

He underwent a cerebrospinal fluid test.

My relationship with him is exactly an unhealthy but unescapable relationship.

Sitting on the park bench, I was staring at the withered tree branch.

My blood type is A.

His idea is really brilliant.