Each of A, B, C, and D has different characteristics.

He is working as a stonemason.

The time it takes for the Earth to orbit the Sun is called a sidereal year.

My younger sister is in her second year of senior high school, and she is busy studying every day.

I learned the alphabet in the order of ABC.

He sang his country's national anthem loudly.

Yokooka-san is my best friend.

The illumination of this room is very bright.

Yesterday, I saw the gates of the Imperial Palace for the first time.

My mother was a teacher at a higher elementary school.