In the old days, small countries used to pay tribute to large countries.

They paid tribute to the king every year.

He has a deep and benevolent affection.

His profound benevolence greatly impressed the people around him.

Her piety left a deep impression on all of us.

The speed of this progressive wave is close to the speed of light.

Soil pollution in this area has become serious due to years of industrial activity.

He is majoring in soil science at university.

He has a deep religious belief.

The progress of this project is going smoothly.