a seat

(a)  

a seat belt

(a)  

a luggage compartment

(a)  

a tray

(a)  

a landing card

(a)  

the flight crew

(a)  

a female flight attendant

(a)  

a male flight attendant

(a)  

to finish

(a)  

to choose

(a)  

to fill (out)

(a)  

to leave

(a)  

to take out, to go out

(a)  

to sleep

(a)  

to serve

(a)  

to fasten

(a)  

to gather

(a)  

under

(a)  

it is necessary

(a)