I wonder what kind of year this will be.

He is a second-year high school student.

He called me back immediately after he hung up the phone.

That information is unnecessary.

That information is completely unnecessary.

He thinks that war is a necessary evil.

Do you understand the necessity of this project?

Earth science is an important field of study for unraveling the mysteries of nature.

I am an Earthling.

We are searching for extraterrestrial life.