His running speed is surprisingly fast.

He was digging a hole in the garden using a spade.

I scooped and drank the soup with a spoon.

On cold days, a heater is necessary.

Hydrocarbons are fundamental components of organic chemistry.

The wheel of my bicycle has gone flat.

Lithium hydride plays an important role in chemical reactions.

Hydrogen peroxide is often used for disinfecting wounds.

He is a world-renowned bacteriologist.

He is a world-famous archaeologist.