综合填空： 根据短文内容选择方框内的单词，并用其正确的形式填入空白处，使补全后的短文意思通顺，语法正确，结构完整。
I am a vet (兽医). Once I was called to examine a ten-year-old dog named Jimmy. The dog’s
owner, Ron, along with his wife and his son all loved Jimmy. I (1) Jimmy and found he
was dying of cancer. I told the family that we could not do anything for Jimmy. After a few
minutes, Jimmy died peacefully. To my (2) , Tom seemed calm. He seemed to understand
Jimmy’s change. We sat together for a while after Jimmy’s death. We talked about the fact that
animal lives are (3) than human lives. Tom, who was listening (4) , suddenly said,
“I know why.” Then, I heard the best reason I had ever heard. He said, “People are born to learn
how to live a good life. They learn to love everybody and be nice all the time. Dogs have already
known how to do that, (5) they don’t have to stay so long.”