He is always slacking off and never does his work.

He is slacking off at work.

He is slacking off at work.

My house is in this district.

The king lives in the castle.

I like watching ducks in the park.

He is suffering from a disease of the thoracic diaphragm.

In the park, a gray-haired old man was sitting on a bench reading a newspaper.

Pluto is one of the planets in the solar system.

Proto-Indo-European is considered the origin of many modern languages.