The historian conducted extensive research on ancient civilizations.

He just arrived at the airport.

I have five apples.

I have a lot of work to do today.

This book is worth reading.

I need to calculate the cost of the project.

I cooked a delicious dish for dinner.

He will die if he doesn't receive medical treatment.

He earned a million dollars last year.

I found a lost dog and returned it to its owner.