题目内容：

阅读下列材料，在空白处填入适当的内容(不多于3个单词)或括号内单词的正确形式。

Being a veterinarian(兽医), I had to examine a ten-year-old Irish Wolfhound named Belker. The dog’s owners, Ron, his wife Lisa, and their boy Shane, loved Belker very much.

I examined Belker and found him 1.     (die) of cancer. I told the family we couldn’t do 2.  for Belker, and offered to perform the euthanasia(安乐死) procedure in their home.

As we made arrangements, Ron and Lisa told me they thought 3.  would be good for six-year-old Shane to watch. They felt Shane might learn something.

The next day, Belker’s family surrounded him. Shane seemed so calm, petting(拍) the old dog for the last time, that I wondered if he understood 4.   was happening. Within a few minutes, Belker slipped 5.       (peaceful) away.

The little boy seemed to accept it without any difficulty. We sat together after Belker’s death, 6. (wonder) why animal lives are shorter than human lives. Shane, having listened quietly, said, “I know 7.     .”

8.    (surprise), we all turned to him. What he said next amazed me. It has changed my life.

He said, “People are born so that they can learn how to live 9.   good life—like loving everybody all the time and being nice, right?”

The six-year-old boy continued, “Well, dogs already know how to do that, 10.  they don’t have to stay as long.”