He was worrying himself about the results of the exam.

Sina is my best friend.

He is walking the path of villainy.

As evening came, the evening rain that started to fall heavily was hitting the window.

Bou is my best friend.

He tried to follow the dog, but the dog was too fast to catch up.

He is passionate about his firefighting job.

Boy, let's play in the park.

This building is equipped with the latest fire prevention facilities.

I've been too busy with work lately to find time to meet my friends.