He is a genius in mathematics.

He sent a reminder letter about the unpaid charges.

My father serves as the president of the mutual aid society.

I will make the maximum effort.

This project may not be profitable.

I love root crops, especially carrots.

This island is located at the northernmost tip of Japan.

He is reading a book in the reading room.

Germ cells play an important role in the reproduction of organisms.

My hobby is needlework.