单选题 It is a good idea for cabin attendants to make themselves familiar ____ the different drinks they may be asked to provide.

单选题 If the cabin attendants find it difficult to follow the passengers speech, they must be ______ , and ask for repetition, if necessary.

单选题 ______ this limitation, some airlines may offer something for a passenger's troubles.

单选题 First aid is ______ knowledge for the cabin attendants.

单选题 Apart_____ greeting the passengers, the cabin crew will give a welcome announcement and perform safety demonstrations.

单选题 Certain other devices may be used on board only after _____ prior permission from the flight crew.

单选题 Gradually more and more passengers_______ the Atlantic by air than by ship.

单选题 The passengers must be shown how to fasten, adjust and _____ their seat belts.