（1）、Why are the people asked to leave the building?
A、Because a shopping bag has been found giving off harmful gas.B、Because something explosive has been discovered.C、Because a fire caused by cigarettes has broken out.
（2）、What are the people asked to do while leaving?
A、To listen to the attendants.B、To hold the elderly and disabled people firmly.C、To go anywhere as quickly as possible.
（3）、What should one do if he is smoking?
A、Throw the cigarette away.B、Give the cigarette to an attendant.C、Put out the cigarette.
（4）、Where may we hear this announcement?
A、In a theatre.B、At an airport.C、In a supermarket.
