17 Where are the passengers? 

[A] In the train 

[B] On the ship 

[C] In the plane 

18 Why has the captain asked the passengers to keep their seat belts on? 

[A] The plane is going to land 

[B] The plane is going to take off 

[C] The air might become very rough 

19 What has the captain asked the passengers not to do during this summer? 

[A] Order drinks 

[B] Smoke cigarettes 

[C] Use the toilets 

20 When will the passengers be able to get up again? 

[A] When an air-hostess says so 

[B] When the seat-belt sign goes off 

[C] When the captain makes another announcement.