I booked a business class for the next flight.

I will take a flight in economy class.

The axiom of choice is one of the basic axioms of mathematics.

He specializes in the study of fish claspers.

She is planning a date with her current boyfriend.

He lost everything.

My boyfriend gave me a gift.

Everyone was surprised by the news.

The delegation left to attend the international conference.

His masterpiece is highly rated all over the world.