Working as a vet （兽医）， I met a family who taught me an unforgettable lesson． They came to my clinic with their dying dog Coco． I examined Coco and found he was old and had a serious illness． I told the family we couldn't do anything for Coco， and euthanasia （安乐死） would be best for the dog．

On that day， they little boy Eric seemed so calm ， petting the old dog for the last time， that I wondered if Eric understood what was going on．

The little boy seemed to accept Coco's death without any difficulty． We sat together for a while after Coco's death， explaining that animal lives are shorter than human lives．

Eric， who had been listening quietly， piped up： "I know why．"

He said， "People need a lifetime to learn how to live a good life-like loving everybody and being nice， right？" The six-year-old continued， "Well， animals already know how to do that， so they don't have to stay as long．"

I'd never heard a more soft-hearted explanation as to why animal lives are so short． It has changed the way I live． I see everyday as the day that my life could be easily taken away， so I try to live my life to the fullest．

（1）What was the matter with Coco？ 　　

A．	She had a stomachache．
B．	She had a headache．
C．	She was old and dying．
D．	She was hurt by her friend．

（2）Which of the following would be best for Coco in the clinic？ 　　

A．	Some delicious food．
B．	Euthanasia．
C．	A good friend．
D．	An interesting toy．

（3）Why Was Eric so calm while petting the dog for the last time？ 　　

A．	Because he didn't know what was going on．
B．	Because he didn't know how to face Coco's death．
C．	Because he had another dog．
D．	Because he accepted Coco's death．

（4）How can we understand Eric's words？ 　　

A．	He thought people already knew how to love others all the time and be nice．
B．	He thought dogs already knew how to love others all the time and be nice．
C．	He didn't think people knew how to love dogs．
D．	He didn't think dog knew how to love people．

（5）According to the passage， we can infer that 　　．

A．	the vet didn't do anything for Coco
B．	the vet makes an effort to live a life
C．	the vet has lived a fullest life
D．	the vet will keep more dogs