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Ladies and gentlemen, We have left London for France. Breakfast has been prepared for you. We will 20 ____you before we serve it. Now we are going to introduce you the use of the cabin installations. The back of your seat can be adjusted by ____ ____21 ____the button on the arm of your chair. The call button and 22 ____are above your head. The ventilator is also above your head. By adjusting the airflow knob, fresh air will flow in or ____23_. Washrooms are located in the front of the cabin and in the back. Please do not 24____ in the washrooms.