His eyes are very sharp.

He is a fourth grader.

He lived in Japan for 10 years.

I wonder what kind of year this will be.

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.

He is a second-year high school student.

It's a hundred meters from my house to school.

He is collecting a hundred old coins.

He solved a hundred problems.

It's a hundred meters from my house to school.