I like watching ducks in the park.

He was wrapping the present.

He was plucking flowers in the garden.

I saw a flock of sheep on the top of the mountain.

He was singing to himself alone in the room.

Unable to bear the pain, he had no choice but to scream.

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.