I have been to Japan three times before.

I wonder what kind of year this will be.

He is a fourth grader.

He lived in Japan for 10 years.

I can't solve this problem because there are too many numbers.

Understanding numbers is important for solving math problems.

He was bedridden with illness for several days.

He tore up the letter in anger.

The use of fossil fuels is causing global warming.

He is a second-year high school student.