Ishimoto is my best friend.

Ishizawa is my best friend.

He is good at hunting using a crossbow.

He accidentally rode his bicycle onto the curb.

The tough base of this mushroom is very hard.

Studying the history of the Middle Ages is very interesting.

He believes in 'an apple a day keeps the doctor away', so he eats fruit every day.

Research on xenotransplantation has the potential to open new frontiers in medicine.

This river has a lot of small stones.

This rock is a type called nepheline.