Sadayoshi is my best friend.

His composition is based on the cantus firmus.

I take the regular bus to school every day.

I live in Baoding city.

His usual location is the seat at the very back of the library.

This contract was established by the stipulation.

He spent a lot of time on the revision of his poetry.

He revised his poetry many times to create a perfect work.

One part is important.

He is studying late into the night to learn a new computer language.