1)How many hours before a flight must a passenger be at

1)How many hours before a flight must a passenger be at the airport?________________ 2) What must a passenger do at the check-in besk?_________________ 3) Where must a passenger show his / her passport ?______________ 4) What mustn' a passenger have in his хэнд baggage?_____________________ 5) What is London's biggest airport?__________________________ ПОМОГИТЕ КТО МОЖЕТ ПОЖАЛУЙСТА СРОЧНО Надобно.