Mr. Lake is my best friend.

We had a picnic at the lakeside.

He likes to discover new music.

He discovered a new planet.

"All right, let's go with that!"

The history of Old Prussia is very interesting.

In astronomy, it is believed that quasars exist in the center of very distant galaxies.

His room is always in a terrible state.

I bought a new coat at the winter sale.

I need to remember, so I don't forget his birthday.