His name is China.

A tesseract is a four-dimensional geometric shape.

The tesseract represents a four-dimensional geometric shape.

He is quite a good cook.

I think his Japanese has improved quite a bit, hasn't it?

I am busy with work during the daytime.

My keys are inside the house.

It is important to understand the importance of health.

His dream is to write a full-length novel.

He sat in front of the computer for a long time.