If we leave that problem unattended, it will likely cause future trouble.

He neglected his work and went to play.

I left my work as-is and went to watch a movie.

Problems always occur because of him.

Can you answer this question?

Moto is my best friend.

He is a former professional soccer player.

During the Yuan dynasty, Chinese culture developed greatly.

He is trying to mend his relationship with his ex-wife.

The main problem with this project is the lack of communication.