Some of the most painful moments I spend as a vet（獸醫(yī)） are those spent with my customers assisting my animal patients from this world to the next．Making this final decision is not easy，and I have often felt powerless to comfort the sorrowful owners．
That was before I met Shane．
I had been called to examine a ten-year-old dog named Belker who had developed a serious health problem．The dogs owner--Ron，his wife，Lisa，and their little boy，Shane--were hoping for a miracle（奇跡）．But I told the family there were no miracles left for Belker，and offered to perform the euthanasia（安樂死） for the old dog in their home．As we made the arrangements，Ron and Lisa told me they thought it would be good for the four-year-old Shane to observe the euthanasia．They felt Shane could learn something from the experience．
The next day， I felt the familiar catch in my throat as Belker's family surrounded him．Shane seemed so calm，patting the old dog for the last time，that I wondered if he understood what was going on．
A few minutes later，Belker slipped peacefully away．The little boy seemed to accept Belker's death without any difficulty or confusion．We sat together for a little while after Belker's death，wondering aloud about the sad fact that animal lives are shorter than human lives．
Shane who had been listening quietly，piped up： "I know why．"
Shocked，we all tuned to him．What came out of his mouth next astonished me．I'd never heard a more comforting explanation．
He said． "Everybody is born so they can learn how to live a good life：like loving everybody and being nice，right？" The four-year-old continued， "Well，animals already know how to do that so they don't have to stay as long．"

（1）Shane's parents wanted Shane to witness the euthanasia mainly because

A

A

．
A．they hoped he could gain something from it
B．they knew he hated to part with Belker
C．they wanted him to remember Belker forever
D．they intended him to learn to carry out euthanasia
（2）What can we learn from the third paragraph？

B

B

A．Belker got sick mainly because of lack of care．
B．There was no hope for Belker to recover but to suffer．
C．Shane didn't feel sad about Belker's death．
D．Belker didn't want to live any longer because of the pain．
（3）We can infer from the underlined sentence that

A

A

．
A．words failed the vet when he tried to comfort Belker's family
B．the vet was familiar with the feelings of Belker's family
C．the vet would rather not perform the euthanasia
D．the vet's throat was uncomfortable with Belke's family around
（4）What would the author say about Shane？

C

C

A．He knew little about animal lives．
B．He felt unexpected about Belker's death．
C．He had a unique opinion about life．
D．He was an outgoing and warm-hearted boy．