He is quite a good cook.

I think his Japanese has improved quite a bit, hasn't it?

I am busy with work during the daytime.

He always acts with fairness.

He always acts fair and square.

He won the game in a fair and square manner.

He always has a fair and square attitude.

The Neoarchean eon was a very important period in the history of the Earth.

The Paleoarchean eon is a very old era in the history of the Earth.

The Mesoarchean eon is a part of Earth's history, which lasted from about 3 billion years ago to about 2.8 billion years ago.