The car's engine is running smoothly.

I can't find the key to my car.

I perform a magic trick at the party.

I love playing tennis.

The Roman Empire was one of the most powerful empires in history.

You should study for the exam.

She is trying to lean against the wall for support.

The police are investigating the crime.

Regular maintenance is essential to keep your car running smoothly.

I received a birthday card from my friend.