Primates are a part of mammals that includes humans.

He is an expert in paleoanthropology, studying the lives of ancient humans.

He tried to solve the problem all day long.

Today is my birthday.

Our store has a regular day off every Monday.

Our project is scheduled to be completed on the twentieth day of the month.

Day after day, he continued to strive to solve the problem.

Do you have any inkling that he is the culprit?

In this picture, the vermilion color stands out strongly.

He ordered red wine.