. Complete the sentences with the words below.

1. At the airport, they provide that number along with photo identification to receive a boarding ___________________.

2. That airliner offers a telephone ___________________ facility for first and economy passengers with hand baggage.

3. The man was stopped at the door by a security ___________________.

4. The cabin ___________________ on an aircraft are the people whose job is to look after the passengers. 

5. She had never flown first ___________________ before because she couldn’t afford them.

6. The mayor also started a ___________________ camera programme so the police can monitor the most heavily trafficked areas of the city.

7. Moments before boarding, I caught a glance of a TV set in the departure ___________________.

8. There were long queues of passengers because only two passport ___________________ booths were open.

10. UNIT 10. The ecosystem