After failing, he tucked his tail between his legs and ran away.

He showed me his new wristwatch.

When the alarm clock rang, I immediately jumped out of bed.

This antique clock is a keepsake from my grandfather.

He measures time accurately using an atomic clock.

He found an ancient fire clock.

There is a new radio clock in my room.

He looked at his pocket watch and checked the time.

My biological clock is completely messed up.

He is an expert in clockwork.