Respecting the rules is a prerequisite for participation.

It is important to plan your trip beforehand.

The private tutor teaches the children at home.

The Precambrian is a very ancient geological period.

The small meadow was once a resting place for the animals.

It is important to take precautions when driving in winter.

It is important to take precautions when driving in winter.

This gemstone is very rare and expensive.

The preamble of the constitution explains the fundamental principles of the country.

He ponders before making an important decision.