In many films，when the owner is in trouble，their beloved dog would run home to seek help without fail.Yet，while this image has become an unforgettable part of our pop culture，few people know the same sort of response applied to service dogs.
    Once a blind man fell flat on his face，which was awful but finally harmless.His service dog，however，was trained to turn to an adult if the owner had an epileptic seizure（癲癇發(fā)作），and it was sure this was a seizure.However，while the dog did what it was taught，the woman found it was merely annoyed but not alarmed.Thankfully，the dog's owner was not in the situation of medical emergency.But the experience inspired him to share this information on social media， "If a service dog without a person approaches you，it means the person is down and in need of help，" the owner explained， "Don't get scared，don't get annoyed，and follow the dog!If the first person doesn't cooperate，it moves on."
    Referring to the accident，a TV presenter asked a dog trainer，Olivia，some basic questions about service dogs，including how humans should react if an unaccompanied service dog approaches them.
    "What they're going to do is sniff and gently push your leg，" the trainer explained，specifically noting that service dogs are not usually trained to jump or bark. "If you see a dog in a vest without a person around it follow it." When asked if one should say something to indicate they're prepared to follow the dog，Olivia said there's no clear command. "The spoken language is not going to be a secret password，" she said. "You can say，'What ？' or 'Where ？' or just start walking wherever the dog leads." Olivia concluded the TV show by adding that those who rely on service dogs could train their companions to move along to someone else，if the first person the dog came upon reacted negatively to its request.Doing so could finally save the owner's life.

（1）What do we know about service dogs？

C

C

A．They can't understand the spoken language.
B．They often make people annoyed.
C．They are seldom known by most people.
D．They only exist in the pop culture.
（2）In the owner's emergency，a service dog will generally

B

B

.
A．run home for help of families
B．a(chǎn)sk the nearby person for help
C．jump or bark to draw people's attention
D．stay beside the owner until the owner recovers
（3）How should people react to an unaccompanied service dog？

A

A

A．Follow it to anywhere it leads.
B．Communicate with it through commands.
C．Keep it home until finding its owner.
D．Take it to the nearest police station.
（4）What is the author's purpose of sharing the story？

D

D

A．To encourage everyone to help disabled people.
B．To introduce a talk show about service dogs.
C．To teach how to train service dogs well.
D．To spread knowledge of dealing with service dogs.